Replace remaining usage of LinkedList with ArrayList/ArrayDeque

Closes gh-25650

spring-aop/src/main/java/org/springframework/aop/framework/ProxyCreatorSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,7 @@
 
 package org.springframework.aop.framework;
 
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 
 import org.springframework.util.Assert;
@@ -34,7 +34,7 @@ public class ProxyCreatorSupport extends AdvisedSupport {
 
 	private AopProxyFactory aopProxyFactory;
 
-	private final List<AdvisedSupportListener> listeners = new LinkedList<>();
+	private final List<AdvisedSupportListener> listeners = new ArrayList<>();
 
 	/** Set to true when the first AOP proxy has been created. */
 	private boolean active = false;

spring-beans/src/main/java/org/springframework/beans/factory/parsing/ParseState.java

@@ -16,12 +16,12 @@
 
 package org.springframework.beans.factory.parsing;
 
-import java.util.LinkedList;
+import java.util.ArrayDeque;
 
 import org.springframework.lang.Nullable;
 
 /**
- * Simple {@link LinkedList}-based structure for tracking the logical position during
+ * Simple {@link ArrayDeque}-based structure for tracking the logical position during
  * a parsing process. {@link Entry entries} are added to the LinkedList at
  * each point during the parse phase in a reader-specific manner.
  *
@@ -30,6 +30,7 @@ import org.springframework.lang.Nullable;
  * error messages.
  *
  * @author Rob Harrop
+ * @author Juergen Hoeller
  * @since 2.0
  */
 public final class ParseState {
@@ -40,25 +41,24 @@ public final class ParseState {
 	private static final char TAB = '\t';
 
 	/**
-	 * Internal {@link LinkedList} storage.
+	 * Internal {@link ArrayDeque} storage.
 	 */
-	private final LinkedList<Entry> state;
+	private final ArrayDeque<Entry> state;
 
 
 	/**
 	 * Create a new {@code ParseState} with an empty {@link LinkedList}.
 	 */
 	public ParseState() {
-		this.state = new LinkedList<>();
+		this.state = new ArrayDeque<>();
 	}
 
 	/**
 	 * Create a new {@code ParseState} whose {@link LinkedList} is a {@link Object#clone clone}
 	 * of that of the passed in {@code ParseState}.
 	 */
-	@SuppressWarnings("unchecked")
 	private ParseState(ParseState other) {
-		this.state = (LinkedList<Entry>) other.state.clone();
+		this.state = other.state.clone();
 	}
 
 
@@ -100,15 +100,17 @@ public final class ParseState {
 	@Override
 	public String toString() {
 		StringBuilder sb = new StringBuilder();
-		for (int x = 0; x < this.state.size(); x++) {
-			if (x > 0) {
+		int i = 0;
+		for (ParseState.Entry entry : this.state) {
+			if (i > 0) {
 				sb.append('\n');
-				for (int y = 0; y < x; y++) {
+				for (int j = 0; j < i; j++) {
 					sb.append(TAB);
 				}
 				sb.append("-> ");
 			}
-			sb.append(this.state.get(x));
+			sb.append(entry);
+			i++;
 		}
 		return sb.toString();
 	}
@@ -118,7 +120,6 @@ public final class ParseState {
 	 * Marker interface for entries into the {@link ParseState}.
 	 */
 	public interface Entry {
-
 	}
 
 }

spring-beans/src/main/java/org/springframework/beans/factory/serviceloader/ServiceListFactoryBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,7 @@
 
 package org.springframework.beans.factory.serviceloader;
 
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.ServiceLoader;
 
@@ -35,7 +35,7 @@ public class ServiceListFactoryBean extends AbstractServiceLoaderBasedFactoryBea
 
 	@Override
 	protected Object getObjectToExpose(ServiceLoader<?> serviceLoader) {
-		List<Object> result = new LinkedList<>();
+		List<Object> result = new ArrayList<>();
 		for (Object loaderObject : serviceLoader) {
 			result.add(loaderObject);
 		}

spring-beans/src/main/java/org/springframework/beans/factory/support/ConstructorResolver.java

@@ -24,12 +24,13 @@ import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
+import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.Deque;
 import java.util.HashSet;
 import java.util.LinkedHashSet;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -199,7 +200,7 @@ class ConstructorResolver {
 			AutowireUtils.sortConstructors(candidates);
 			int minTypeDiffWeight = Integer.MAX_VALUE;
 			Set<Constructor<?>> ambiguousConstructors = null;
-			LinkedList<UnsatisfiedDependencyException> causes = null;
+			Deque<UnsatisfiedDependencyException> causes = null;
 
 			for (Constructor<?> candidate : candidates) {
 				int parameterCount = candidate.getParameterCount();
@@ -233,7 +234,7 @@ class ConstructorResolver {
 						}
 						// Swallow and try next constructor.
 						if (causes == null) {
-							causes = new LinkedList<>();
+							causes = new ArrayDeque<>(1);
 						}
 						causes.add(ex);
 						continue;
@@ -511,7 +512,7 @@ class ConstructorResolver {
 				}
 			}
 
-			LinkedList<UnsatisfiedDependencyException> causes = null;
+			Deque<UnsatisfiedDependencyException> causes = null;
 
 			for (Method candidate : candidates) {
 				int parameterCount = candidate.getParameterCount();
@@ -544,7 +545,7 @@ class ConstructorResolver {
 							}
 							// Swallow and try next overloaded factory method.
 							if (causes == null) {
-								causes = new LinkedList<>();
+								causes = new ArrayDeque<>(1);
 							}
 							causes.add(ex);
 							continue;

spring-beans/src/main/java/org/springframework/beans/factory/support/ReplaceOverride.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,7 +17,7 @@
 package org.springframework.beans.factory.support;
 
 import java.lang.reflect.Method;
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 
 import org.springframework.lang.Nullable;
@@ -39,7 +39,7 @@ public class ReplaceOverride extends MethodOverride {
 
 	private final String methodReplacerBeanName;
 
-	private List<String> typeIdentifiers = new LinkedList<>();
+	private final List<String> typeIdentifiers = new ArrayList<>();
 
 
 	/**
@@ -70,6 +70,7 @@ public class ReplaceOverride extends MethodOverride {
 		this.typeIdentifiers.add(identifier);
 	}
 
+
 	@Override
 	public boolean matches(Method method) {
 		if (!method.getName().equals(getMethodName())) {

spring-beans/src/testFixtures/java/org/springframework/beans/testfixture/beans/CollectingReaderEventListener.java

@@ -20,7 +20,6 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedHashMap;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 
@@ -36,13 +35,13 @@ import org.springframework.beans.factory.parsing.ReaderEventListener;
  */
 public class CollectingReaderEventListener implements ReaderEventListener {
 
-	private final List<DefaultsDefinition> defaults = new LinkedList<>();
+	private final List<DefaultsDefinition> defaults = new ArrayList<>();
 
 	private final Map<String, ComponentDefinition> componentDefinitions = new LinkedHashMap<>(8);
 
 	private final Map<String, List<AliasDefinition>> aliasMap = new LinkedHashMap<>(8);
 
-	private final List<ImportDefinition> imports = new LinkedList<>();
+	private final List<ImportDefinition> imports = new ArrayList<>();
 
 
 	@Override

spring-beans/src/testFixtures/java/org/springframework/beans/testfixture/beans/TestBean.java

@@ -22,7 +22,6 @@ import java.util.Collection;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.HashSet;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Properties;
@@ -77,7 +76,7 @@ public class TestBean implements BeanNameAware, BeanFactoryAware, ITestBean, IOt
 
 	private Float myFloat = Float.valueOf(0.0f);
 
-	private Collection<? super Object> friends = new LinkedList<>();
+	private Collection<? super Object> friends = new ArrayList<>();
 
 	private Set<?> someSet = new HashSet<>();
 

spring-context-support/src/main/java/org/springframework/scheduling/commonj/TimerManagerFactoryBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,7 @@
 
 package org.springframework.scheduling.commonj;
 
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 
 import javax.naming.NamingException;
@@ -62,7 +62,8 @@ public class TimerManagerFactoryBean extends TimerManagerAccessor
 	@Nullable
 	private ScheduledTimerListener[] scheduledTimerListeners;
 
-	private final List<Timer> timers = new LinkedList<>();
+	@Nullable
+	private List<Timer> timers;
 
 
 	/**
@@ -87,6 +88,7 @@ public class TimerManagerFactoryBean extends TimerManagerAccessor
 		super.afterPropertiesSet();
 
 		if (this.scheduledTimerListeners != null) {
+			this.timers = new ArrayList<>(this.scheduledTimerListeners.length);
 			TimerManager timerManager = obtainTimerManager();
 			for (ScheduledTimerListener scheduledTask : this.scheduledTimerListeners) {
 				Timer timer;
@@ -144,15 +146,17 @@ public class TimerManagerFactoryBean extends TimerManagerAccessor
 	@Override
 	public void destroy() {
 		// Cancel all registered timers.
-		for (Timer timer : this.timers) {
-			try {
-				timer.cancel();
-			}
-			catch (Throwable ex) {
-				logger.debug("Could not cancel CommonJ Timer", ex);
+		if (this.timers != null) {
+			for (Timer timer : this.timers) {
+				try {
+					timer.cancel();
+				}
+				catch (Throwable ex) {
+					logger.debug("Could not cancel CommonJ Timer", ex);
+				}
 			}
+			this.timers.clear();
 		}
-		this.timers.clear();
 
 		// Stop the TimerManager itself.
 		super.destroy();

spring-context-support/src/main/java/org/springframework/scheduling/quartz/SchedulerAccessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,7 +18,6 @@ package org.springframework.scheduling.quartz;
 
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 
@@ -228,7 +227,7 @@ public abstract class SchedulerAccessor implements ResourceLoaderAware {
 			}
 			else {
 				// Create empty list for easier checks when registering triggers.
-				this.jobDetails = new LinkedList<>();
+				this.jobDetails = new ArrayList<>();
 			}
 
 			// Register Calendars.

spring-context/src/main/java/org/springframework/cache/interceptor/CacheAspectSupport.java

@@ -21,7 +21,6 @@ import java.lang.reflect.Proxy;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
@@ -403,7 +402,7 @@ public abstract class CacheAspectSupport extends AbstractCacheInvoker
 		Cache.ValueWrapper cacheHit = findCachedItem(contexts.get(CacheableOperation.class));
 
 		// Collect puts from any @Cacheable miss, if no cached item is found
-		List<CachePutRequest> cachePutRequests = new LinkedList<>();
+		List<CachePutRequest> cachePutRequests = new ArrayList<>();
 		if (cacheHit == null) {
 			collectPutRequests(contexts.get(CacheableOperation.class),
 					CacheOperationExpressionEvaluator.NO_RESULT, cachePutRequests);

spring-context/src/main/java/org/springframework/context/annotation/ClassPathScanningCandidateComponentProvider.java

@@ -18,9 +18,9 @@ package org.springframework.context.annotation;
 
 import java.io.IOException;
 import java.lang.annotation.Annotation;
+import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.LinkedHashSet;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Set;
 
@@ -93,9 +93,9 @@ public class ClassPathScanningCandidateComponentProvider implements EnvironmentC
 
 	private String resourcePattern = DEFAULT_RESOURCE_PATTERN;
 
-	private final List<TypeFilter> includeFilters = new LinkedList<>();
+	private final List<TypeFilter> includeFilters = new ArrayList<>();
 
-	private final List<TypeFilter> excludeFilters = new LinkedList<>();
+	private final List<TypeFilter> excludeFilters = new ArrayList<>();
 
 	@Nullable
 	private Environment environment;

spring-context/src/main/java/org/springframework/instrument/classloading/ShadowingClassLoader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,9 +21,9 @@ import java.io.InputStream;
 import java.lang.instrument.ClassFileTransformer;
 import java.lang.instrument.IllegalClassFormatException;
 import java.net.URL;
+import java.util.ArrayList;
 import java.util.Enumeration;
 import java.util.HashMap;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 
@@ -55,7 +55,7 @@ public class ShadowingClassLoader extends DecoratingClassLoader {
 
 	private final ClassLoader enclosingClassLoader;
 
-	private final List<ClassFileTransformer> classFileTransformers = new LinkedList<>();
+	private final List<ClassFileTransformer> classFileTransformers = new ArrayList<>(1);
 
 	private final Map<String, Class<?>> classCache = new HashMap<>();
 

spring-context/src/main/java/org/springframework/validation/AbstractBindingResult.java

@@ -18,11 +18,11 @@ package org.springframework.validation;
 
 import java.beans.PropertyEditor;
 import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.LinkedHashMap;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -50,7 +50,7 @@ public abstract class AbstractBindingResult extends AbstractErrors implements Bi
 
 	private MessageCodesResolver messageCodesResolver = new DefaultMessageCodesResolver();
 
-	private final List<ObjectError> errors = new LinkedList<>();
+	private final List<ObjectError> errors = new ArrayList<>();
 
 	private final Map<String, Class<?>> fieldTypes = new HashMap<>();
 
@@ -145,7 +145,7 @@ public abstract class AbstractBindingResult extends AbstractErrors implements Bi
 
 	@Override
 	public List<ObjectError> getGlobalErrors() {
-		List<ObjectError> result = new LinkedList<>();
+		List<ObjectError> result = new ArrayList<>();
 		for (ObjectError objectError : this.errors) {
 			if (!(objectError instanceof FieldError)) {
 				result.add(objectError);
@@ -167,7 +167,7 @@ public abstract class AbstractBindingResult extends AbstractErrors implements Bi
 
 	@Override
 	public List<FieldError> getFieldErrors() {
-		List<FieldError> result = new LinkedList<>();
+		List<FieldError> result = new ArrayList<>();
 		for (ObjectError objectError : this.errors) {
 			if (objectError instanceof FieldError) {
 				result.add((FieldError) objectError);
@@ -189,7 +189,7 @@ public abstract class AbstractBindingResult extends AbstractErrors implements Bi
 
 	@Override
 	public List<FieldError> getFieldErrors(String field) {
-		List<FieldError> result = new LinkedList<>();
+		List<FieldError> result = new ArrayList<>();
 		String fixedField = fixedField(field);
 		for (ObjectError objectError : this.errors) {
 			if (objectError instanceof FieldError && isMatchingFieldError(fixedField, (FieldError) objectError)) {

spring-context/src/main/java/org/springframework/validation/AbstractErrors.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,9 +18,9 @@ package org.springframework.validation;
 
 import java.io.Serializable;
 import java.util.ArrayDeque;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Deque;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.NoSuchElementException;
 
@@ -146,7 +146,7 @@ public abstract class AbstractErrors implements Errors, Serializable {
 
 	@Override
 	public List<ObjectError> getAllErrors() {
-		List<ObjectError> result = new LinkedList<>();
+		List<ObjectError> result = new ArrayList<>();
 		result.addAll(getGlobalErrors());
 		result.addAll(getFieldErrors());
 		return Collections.unmodifiableList(result);
@@ -199,7 +199,7 @@ public abstract class AbstractErrors implements Errors, Serializable {
 	@Override
 	public List<FieldError> getFieldErrors(String field) {
 		List<FieldError> fieldErrors = getFieldErrors();
-		List<FieldError> result = new LinkedList<>();
+		List<FieldError> result = new ArrayList<>();
 		String fixedField = fixedField(field);
 		for (FieldError error : fieldErrors) {
 			if (isMatchingFieldError(fixedField, error)) {

spring-context/src/testFixtures/java/org/springframework/context/testfixture/SimpleMapScope.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,9 +17,9 @@
 package org.springframework.context.testfixture;
 
 import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 
@@ -34,7 +34,7 @@ public class SimpleMapScope implements Scope, Serializable {
 
 	private final Map<String, Object> map = new HashMap<>();
 
-	private final List<Runnable> callbacks = new LinkedList<>();
+	private final List<Runnable> callbacks = new ArrayList<>();
 
 
 	public SimpleMapScope() {

spring-core/src/main/java/org/springframework/core/PrioritizedParameterNameDiscoverer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,7 +18,7 @@ package org.springframework.core;
 
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Method;
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 
 import org.springframework.lang.Nullable;
@@ -36,7 +36,7 @@ import org.springframework.lang.Nullable;
  */
 public class PrioritizedParameterNameDiscoverer implements ParameterNameDiscoverer {
 
-	private final List<ParameterNameDiscoverer> parameterNameDiscoverers = new LinkedList<>();
+	private final List<ParameterNameDiscoverer> parameterNameDiscoverers = new ArrayList<>(2);
 
 
 	/**

spring-core/src/main/java/org/springframework/core/convert/support/GenericConversionService.java

@@ -17,12 +17,13 @@
 package org.springframework.core.convert.support;
 
 import java.lang.reflect.Array;
+import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.Deque;
 import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
@@ -651,7 +652,7 @@ public class GenericConversionService implements ConfigurableConversionService {
 	 */
 	private static class ConvertersForPair {
 
-		private final LinkedList<GenericConverter> converters = new LinkedList<>();
+		private final Deque<GenericConverter> converters = new ArrayDeque<>(1);
 
 		public void add(GenericConverter converter) {
 			this.converters.addFirst(converter);

spring-core/src/main/java/org/springframework/util/AntPathMatcher.java

@@ -16,9 +16,9 @@
 
 package org.springframework.util;
 
+import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.LinkedHashMap;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
@@ -655,7 +655,7 @@ public class AntPathMatcher implements PathMatcher {
 		@Nullable
 		private final Pattern pattern;
 
-		private final List<String> variableNames = new LinkedList<>();
+		private final List<String> variableNames = new ArrayList<>();
 
 		public AntPathStringMatcher(String pattern) {
 			this(pattern, true);

spring-core/src/main/java/org/springframework/util/FastByteArrayOutputStream.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,8 +20,9 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.security.MessageDigest;
+import java.util.ArrayDeque;
+import java.util.Deque;
 import java.util.Iterator;
-import java.util.LinkedList;
 
 import org.springframework.lang.Nullable;
 
@@ -50,7 +51,7 @@ public class FastByteArrayOutputStream extends OutputStream {
 
 
 	// The buffers used to store the content bytes
-	private final LinkedList<byte[]> buffers = new LinkedList<>();
+	private final Deque<byte[]> buffers = new ArrayDeque<>();
 
 	// The size, in bytes, to use when allocating the first byte[]
 	private final int initialBlockSize;

spring-core/src/main/java/org/springframework/util/LinkedMultiValueMap.java

@@ -17,14 +17,14 @@
 package org.springframework.util;
 
 import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.LinkedHashMap;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 
 /**
  * Simple implementation of {@link MultiValueMap} that wraps a {@link LinkedHashMap},
- * storing multiple values in a {@link LinkedList}.
+ * storing multiple values in an {@link ArrayList}.
  *
  * <p>This Map implementation is generally not thread-safe. It is primarily designed
  * for data structures exposed from request objects, for use in a single thread only.
@@ -75,7 +75,7 @@ public class LinkedMultiValueMap<K, V> extends MultiValueMapAdapter<K, V> implem
 	/**
 	 * Create a deep copy of this Map.
 	 * @return a copy of this Map, including a copy of each value-holding List entry
-	 * (consistently using an independent modifiable {@link LinkedList} for each entry)
+	 * (consistently using an independent modifiable {@link ArrayList} for each entry)
 	 * along the lines of {@code MultiValueMap.addAll} semantics
 	 * @since 4.2
 	 * @see #addAll(MultiValueMap)
@@ -83,7 +83,7 @@ public class LinkedMultiValueMap<K, V> extends MultiValueMapAdapter<K, V> implem
 	 */
 	public LinkedMultiValueMap<K, V> deepCopy() {
 		LinkedMultiValueMap<K, V> copy = new LinkedMultiValueMap<>(size());
-		forEach((key, values) -> copy.put(key, new LinkedList<>(values)));
+		forEach((key, values) -> copy.put(key, new ArrayList<>(values)));
 		return copy;
 	}
 

spring-core/src/main/java/org/springframework/util/MultiValueMapAdapter.java

@@ -17,8 +17,8 @@
 package org.springframework.util;
 
 import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.Collection;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -56,13 +56,13 @@ class MultiValueMapAdapter<K, V> implements MultiValueMap<K, V>, Serializable {
 
 	@Override
 	public void add(K key, @Nullable V value) {
-		List<V> values = this.targetMap.computeIfAbsent(key, k -> new LinkedList<>());
+		List<V> values = this.targetMap.computeIfAbsent(key, k -> new ArrayList<>(1));
 		values.add(value);
 	}
 
 	@Override
 	public void addAll(K key, List<? extends V> values) {
-		List<V> currentValues = this.targetMap.computeIfAbsent(key, k -> new LinkedList<>());
+		List<V> currentValues = this.targetMap.computeIfAbsent(key, k -> new ArrayList<>(1));
 		currentValues.addAll(values);
 	}
 
@@ -75,7 +75,7 @@ class MultiValueMapAdapter<K, V> implements MultiValueMap<K, V>, Serializable {
 
 	@Override
 	public void set(K key, @Nullable V value) {
-		List<V> values = new LinkedList<>();
+		List<V> values = new ArrayList<>(1);
 		values.add(value);
 		this.targetMap.put(key, values);
 	}

spring-core/src/main/java/org/springframework/util/StopWatch.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,7 +17,7 @@
 package org.springframework.util;
 
 import java.text.NumberFormat;
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 
@@ -55,7 +55,7 @@ public class StopWatch {
 
 	private boolean keepTaskList = true;
 
-	private final List<TaskInfo> taskList = new LinkedList<>();
+	private final List<TaskInfo> taskList = new ArrayList<>(1);
 
 	/** Start time of the current task. */
 	private long startTimeNanos;

spring-core/src/main/java/org/springframework/util/StringUtils.java

@@ -18,14 +18,15 @@ package org.springframework.util;
 
 import java.io.ByteArrayOutputStream;
 import java.nio.charset.Charset;
+import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.Deque;
 import java.util.Enumeration;
 import java.util.Iterator;
 import java.util.LinkedHashSet;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Locale;
 import java.util.Properties;
@@ -693,7 +694,7 @@ public abstract class StringUtils {
 		}
 
 		String[] pathArray = delimitedListToStringArray(pathToUse, FOLDER_SEPARATOR);
-		LinkedList<String> pathElements = new LinkedList<>();
+		Deque<String> pathElements = new ArrayDeque<>();
 		int tops = 0;
 
 		for (int i = pathArray.length - 1; i >= 0; i--) {
@@ -712,7 +713,7 @@ public abstract class StringUtils {
 				}
 				else {
 					// Normal path element found.
-					pathElements.add(0, element);
+					pathElements.addFirst(element);
 				}
 			}
 		}
@@ -723,11 +724,11 @@ public abstract class StringUtils {
 		}
 		// Remaining top paths need to be retained.
 		for (int i = 0; i < tops; i++) {
-			pathElements.add(0, TOP_PATH);
+			pathElements.addFirst(TOP_PATH);
 		}
 		// If nothing else left, at least explicitly point to current path.
 		if (pathElements.size() == 1 && pathElements.getLast().isEmpty() && !prefix.endsWith(FOLDER_SEPARATOR)) {
-			pathElements.add(0, CURRENT_PATH);
+			pathElements.addFirst(CURRENT_PATH);
 		}
 
 		return prefix + collectionToDelimitedString(pathElements, FOLDER_SEPARATOR);

spring-core/src/main/java/org/springframework/util/concurrent/ListenableFutureCallbackRegistry.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,7 @@
 
 package org.springframework.util.concurrent;
 
-import java.util.LinkedList;
+import java.util.ArrayDeque;
 import java.util.Queue;
 
 import org.springframework.lang.Nullable;
@@ -36,9 +36,9 @@ import org.springframework.util.Assert;
  */
 public class ListenableFutureCallbackRegistry<T> {
 
-	private final Queue<SuccessCallback<? super T>> successCallbacks = new LinkedList<>();
+	private final Queue<SuccessCallback<? super T>> successCallbacks = new ArrayDeque<>(1);
 
-	private final Queue<FailureCallback> failureCallbacks = new LinkedList<>();
+	private final Queue<FailureCallback> failureCallbacks = new ArrayDeque<>(1);
 
 	private State state = State.NEW;
 

spring-expression/src/main/java/org/springframework/expression/spel/support/StandardTypeLocator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,8 @@
 
 package org.springframework.expression.spel.support;
 
+import java.util.ArrayList;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 
 import org.springframework.expression.EvaluationException;
@@ -41,7 +41,7 @@ public class StandardTypeLocator implements TypeLocator {
 	@Nullable
 	private final ClassLoader classLoader;
 
-	private final List<String> knownPackagePrefixes = new LinkedList<>();
+	private final List<String> knownPackagePrefixes = new ArrayList<>(1);
 
 
 	/**

spring-jdbc/src/main/java/org/springframework/jdbc/core/CallableStatementCreatorFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,8 +20,8 @@ import java.sql.CallableStatement;
 import java.sql.Connection;
 import java.sql.ResultSet;
 import java.sql.SQLException;
+import java.util.ArrayList;
 import java.util.HashMap;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 
@@ -57,7 +57,7 @@ public class CallableStatementCreatorFactory {
 	 */
 	public CallableStatementCreatorFactory(String callString) {
 		this.callString = callString;
-		this.declaredParameters = new LinkedList<>();
+		this.declaredParameters = new ArrayList<>();
 	}
 
 	/**

spring-jdbc/src/main/java/org/springframework/jdbc/core/PreparedStatementCreatorFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,10 +21,10 @@ import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Types;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashSet;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Set;
 
@@ -66,7 +66,7 @@ public class PreparedStatementCreatorFactory {
 	 */
 	public PreparedStatementCreatorFactory(String sql) {
 		this.sql = sql;
-		this.declaredParameters = new LinkedList<>();
+		this.declaredParameters = new ArrayList<>();
 	}
 
 	/**

spring-jdbc/src/main/java/org/springframework/jdbc/core/SqlParameter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,7 +17,6 @@
 package org.springframework.jdbc.core;
 
 import java.util.ArrayList;
-import java.util.LinkedList;
 import java.util.List;
 
 import org.springframework.lang.Nullable;
@@ -186,7 +185,7 @@ public class SqlParameter {
 	 */
 	public static List<SqlParameter> sqlTypesToAnonymousParameterList(@Nullable int... types) {
 		if (types == null) {
-			return new LinkedList<>();
+			return new ArrayList<>();
 		}
 		List<SqlParameter> result = new ArrayList<>(types.length);
 		for (int type : types) {

spring-jdbc/src/main/java/org/springframework/jdbc/object/RdbmsOperation.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,9 +18,9 @@ package org.springframework.jdbc.object;
 
 import java.sql.ResultSet;
 import java.sql.Types;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 
@@ -79,7 +79,7 @@ public abstract class RdbmsOperation implements InitializingBean {
 	@Nullable
 	private String sql;
 
-	private final List<SqlParameter> declaredParameters = new LinkedList<>();
+	private final List<SqlParameter> declaredParameters = new ArrayList<>();
 
 	/**
 	 * Has this operation been compiled? Compilation means at

spring-jdbc/src/main/java/org/springframework/jdbc/support/GeneratedKeyHolder.java

@@ -16,8 +16,8 @@
 
 package org.springframework.jdbc.support;
 
+import java.util.ArrayList;
 import java.util.Iterator;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 
@@ -47,7 +47,7 @@ public class GeneratedKeyHolder implements KeyHolder {
 	 * Create a new GeneratedKeyHolder with a default list.
 	 */
 	public GeneratedKeyHolder() {
-		this.keyList = new LinkedList<>();
+		this.keyList = new ArrayList<>(1);
 	}
 
 	/**

spring-jms/src/main/java/org/springframework/jms/connection/CachingConnectionFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,10 +20,11 @@ import java.lang.reflect.InvocationHandler;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.lang.reflect.Proxy;
+import java.util.ArrayDeque;
 import java.util.ArrayList;
+import java.util.Deque;
 import java.util.HashMap;
 import java.util.Iterator;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
@@ -94,7 +95,7 @@ public class CachingConnectionFactory extends SingleConnectionFactory {
 
 	private volatile boolean active = true;
 
-	private final ConcurrentMap<Integer, LinkedList<Session>> cachedSessions = new ConcurrentHashMap<>();
+	private final ConcurrentMap<Integer, Deque<Session>> cachedSessions = new ConcurrentHashMap<>();
 
 
 	/**
@@ -186,7 +187,7 @@ public class CachingConnectionFactory extends SingleConnectionFactory {
 		this.active = false;
 
 		synchronized (this.cachedSessions) {
-			for (LinkedList<Session> sessionList : this.cachedSessions.values()) {
+			for (Deque<Session> sessionList : this.cachedSessions.values()) {
 				synchronized (sessionList) {
 					for (Session session : sessionList) {
 						try {
@@ -216,7 +217,7 @@ public class CachingConnectionFactory extends SingleConnectionFactory {
 			return null;
 		}
 
-		LinkedList<Session> sessionList = this.cachedSessions.computeIfAbsent(mode, k -> new LinkedList<>());
+		Deque<Session> sessionList = this.cachedSessions.computeIfAbsent(mode, k -> new ArrayDeque<>());
 		Session session = null;
 		synchronized (sessionList) {
 			if (!sessionList.isEmpty()) {
@@ -247,7 +248,7 @@ public class CachingConnectionFactory extends SingleConnectionFactory {
 	 * @param sessionList the List of cached Sessions that the given Session belongs to
 	 * @return the wrapped Session
 	 */
-	protected Session getCachedSessionProxy(Session target, LinkedList<Session> sessionList) {
+	protected Session getCachedSessionProxy(Session target, Deque<Session> sessionList) {
 		List<Class<?>> classes = new ArrayList<>(3);
 		classes.add(SessionProxy.class);
 		if (target instanceof QueueSession) {
@@ -268,7 +269,7 @@ public class CachingConnectionFactory extends SingleConnectionFactory {
 
 		private final Session target;
 
-		private final LinkedList<Session> sessionList;
+		private final Deque<Session> sessionList;
 
 		private final Map<DestinationCacheKey, MessageProducer> cachedProducers = new HashMap<>();
 
@@ -276,7 +277,7 @@ public class CachingConnectionFactory extends SingleConnectionFactory {
 
 		private boolean transactionOpen = false;
 
-		public CachedSessionInvocationHandler(Session target, LinkedList<Session> sessionList) {
+		public CachedSessionInvocationHandler(Session target, Deque<Session> sessionList) {
 			this.target = target;
 			this.sessionList = sessionList;
 		}

spring-jms/src/main/java/org/springframework/jms/connection/JmsResourceHolder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,8 +17,9 @@
 package org.springframework.jms.connection;
 
 import java.lang.reflect.Method;
+import java.util.ArrayDeque;
+import java.util.Deque;
 import java.util.HashMap;
-import java.util.LinkedList;
 import java.util.Map;
 
 import javax.jms.Connection;
@@ -58,11 +59,11 @@ public class JmsResourceHolder extends ResourceHolderSupport {
 
 	private boolean frozen = false;
 
-	private final LinkedList<Connection> connections = new LinkedList<>();
+	private final Deque<Connection> connections = new ArrayDeque<>();
 
-	private final LinkedList<Session> sessions = new LinkedList<>();
+	private final Deque<Session> sessions = new ArrayDeque<>();
 
-	private final Map<Connection, LinkedList<Session>> sessionsPerConnection = new HashMap<>();
+	private final Map<Connection, Deque<Session>> sessionsPerConnection = new HashMap<>();
 
 
 	/**
@@ -155,8 +156,8 @@ public class JmsResourceHolder extends ResourceHolderSupport {
 		if (!this.sessions.contains(session)) {
 			this.sessions.add(session);
 			if (connection != null) {
-				LinkedList<Session> sessions =
-						this.sessionsPerConnection.computeIfAbsent(connection, k -> new LinkedList<>());
+				Deque<Session> sessions =
+						this.sessionsPerConnection.computeIfAbsent(connection, k -> new ArrayDeque<>());
 				sessions.add(session);
 			}
 		}
@@ -223,7 +224,7 @@ public class JmsResourceHolder extends ResourceHolderSupport {
 	 */
 	@Nullable
 	public <S extends Session> S getSession(Class<S> sessionType, @Nullable Connection connection) {
-		LinkedList<Session> sessions =
+		Deque<Session> sessions =
 				(connection != null ? this.sessionsPerConnection.get(connection) : this.sessions);
 		return CollectionUtils.findValueOfType(sessions, sessionType);
 	}

spring-jms/src/main/java/org/springframework/jms/listener/AbstractJmsListeningContainer.java

@@ -16,8 +16,8 @@
 
 package org.springframework.jms.listener;
 
+import java.util.ArrayList;
 import java.util.Iterator;
-import java.util.LinkedList;
 import java.util.List;
 
 import javax.jms.Connection;
@@ -83,7 +83,7 @@ public abstract class AbstractJmsListeningContainer extends JmsDestinationAccess
 
 	private volatile boolean running;
 
-	private final List<Object> pausedTasks = new LinkedList<>();
+	private final List<Object> pausedTasks = new ArrayList<>();
 
 	protected final Object lifecycleMonitor = new Object();
 

spring-messaging/src/main/java/org/springframework/messaging/handler/invocation/HandlerMethodArgumentResolverComposite.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,8 @@
 
 package org.springframework.messaging.handler.invocation;
 
+import java.util.ArrayList;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
@@ -37,7 +37,7 @@ import org.springframework.messaging.Message;
  */
 public class HandlerMethodArgumentResolverComposite implements HandlerMethodArgumentResolver {
 
-	private final List<HandlerMethodArgumentResolver> argumentResolvers = new LinkedList<>();
+	private final List<HandlerMethodArgumentResolver> argumentResolvers = new ArrayList<>();
 
 	private final Map<MethodParameter, HandlerMethodArgumentResolver> argumentResolverCache =
 			new ConcurrentHashMap<>(256);

spring-messaging/src/main/java/org/springframework/messaging/handler/invocation/reactive/HandlerMethodArgumentResolverComposite.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,8 @@
 
 package org.springframework.messaging.handler.invocation.reactive;
 
+import java.util.ArrayList;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
@@ -42,7 +42,7 @@ public class HandlerMethodArgumentResolverComposite implements HandlerMethodArgu
 
 	protected final Log logger = LogFactory.getLog(getClass());
 
-	private final List<HandlerMethodArgumentResolver> argumentResolvers = new LinkedList<>();
+	private final List<HandlerMethodArgumentResolver> argumentResolvers = new ArrayList<>();
 
 	private final Map<MethodParameter, HandlerMethodArgumentResolver> argumentResolverCache =
 			new ConcurrentHashMap<>(256);
@@ -113,9 +113,8 @@ public class HandlerMethodArgumentResolverComposite implements HandlerMethodArgu
 	public Mono<Object> resolveArgument(MethodParameter parameter, Message<?> message) {
 		HandlerMethodArgumentResolver resolver = getArgumentResolver(parameter);
 		if (resolver == null) {
-			throw new IllegalArgumentException(
-					"Unsupported parameter type [" + parameter.getParameterType().getName() + "]." +
-							" supportsParameter should be called first.");
+			throw new IllegalArgumentException("Unsupported parameter type [" +
+					parameter.getParameterType().getName() + "]. supportsParameter should be called first.");
 		}
 		return resolver.resolveArgument(parameter, message);
 	}

spring-messaging/src/main/java/org/springframework/messaging/simp/stomp/StompEncoder.java

@@ -17,9 +17,9 @@
 package org.springframework.messaging.simp.stomp;
 
 import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.LinkedHashMap;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
@@ -228,15 +228,14 @@ public class StompEncoder  {
 		void add(byte b);
 
 		byte[] toByteArray();
-
 	}
 
+
 	@SuppressWarnings("serial")
-	private static class DefaultResult extends LinkedList<Object> implements Result {
+	private static class DefaultResult extends ArrayList<Object> implements Result {
 
 		private int size;
 
-
 		public void add(byte[] bytes) {
 			this.size += bytes.length;
 			super.add(bytes);

spring-messaging/src/main/java/org/springframework/messaging/simp/stomp/StompHeaders.java

@@ -17,11 +17,11 @@
 package org.springframework.messaging.simp.stomp;
 
 import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedHashMap;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -446,13 +446,13 @@ public class StompHeaders implements MultiValueMap<String, String>, Serializable
 	 */
 	@Override
 	public void add(String headerName, @Nullable String headerValue) {
-		List<String> headerValues = this.headers.computeIfAbsent(headerName, k -> new LinkedList<>());
+		List<String> headerValues = this.headers.computeIfAbsent(headerName, k -> new ArrayList<>(1));
 		headerValues.add(headerValue);
 	}
 
 	@Override
 	public void addAll(String headerName, List<? extends String> headerValues) {
-		List<String> currentValues = this.headers.computeIfAbsent(headerName, k -> new LinkedList<>());
+		List<String> currentValues = this.headers.computeIfAbsent(headerName, k -> new ArrayList<>(1));
 		currentValues.addAll(headerValues);
 	}
 
@@ -471,7 +471,7 @@ public class StompHeaders implements MultiValueMap<String, String>, Serializable
 	 */
 	@Override
 	public void set(String headerName, @Nullable String headerValue) {
-		List<String> headerValues = new LinkedList<>();
+		List<String> headerValues = new ArrayList<>(1);
 		headerValues.add(headerValue);
 		this.headers.put(headerName, headerValues);
 	}

spring-messaging/src/main/java/org/springframework/messaging/support/NativeMessageHeaderAccessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,8 @@
 
 package org.springframework.messaging.support;
 
+import java.util.ArrayList;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 
@@ -166,7 +166,7 @@ public class NativeMessageHeaderAccessor extends MessageHeaderAccessor {
 			map = new LinkedMultiValueMap<>(3);
 			setHeader(NATIVE_HEADERS, map);
 		}
-		List<String> values = new LinkedList<>();
+		List<String> values = new ArrayList<>(1);
 		values.add(value);
 		if (!ObjectUtils.nullSafeEquals(values, getHeader(name))) {
 			setModified(true);
@@ -187,7 +187,7 @@ public class NativeMessageHeaderAccessor extends MessageHeaderAccessor {
 			nativeHeaders = new LinkedMultiValueMap<>(3);
 			setHeader(NATIVE_HEADERS, nativeHeaders);
 		}
-		List<String> values = nativeHeaders.computeIfAbsent(name, k -> new LinkedList<>());
+		List<String> values = nativeHeaders.computeIfAbsent(name, k -> new ArrayList<>(1));
 		values.add(value);
 		setModified(true);
 	}

spring-orm/src/main/java/org/springframework/orm/jpa/persistenceunit/DefaultPersistenceUnitManager.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,10 +18,10 @@ package org.springframework.orm.jpa.persistenceunit;
 
 import java.io.IOException;
 import java.net.URL;
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.LinkedHashSet;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -498,7 +498,7 @@ public class DefaultPersistenceUnitManager
 	 * as defined in the JPA specification.
 	 */
 	private List<SpringPersistenceUnitInfo> readPersistenceUnitInfos() {
-		List<SpringPersistenceUnitInfo> infos = new LinkedList<>();
+		List<SpringPersistenceUnitInfo> infos = new ArrayList<>(1);
 		String defaultName = this.defaultPersistenceUnitName;
 		boolean buildDefaultUnit = (this.packagesToScan != null || this.mappingResources != null);
 		boolean foundDefaultUnit = false;

spring-orm/src/main/java/org/springframework/orm/jpa/persistenceunit/MutablePersistenceUnitInfo.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,7 +17,7 @@
 package org.springframework.orm.jpa.persistenceunit;
 
 import java.net.URL;
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Properties;
 
@@ -61,16 +61,16 @@ public class MutablePersistenceUnitInfo implements SmartPersistenceUnitInfo {
 	@Nullable
 	private DataSource jtaDataSource;
 
-	private final List<String> mappingFileNames = new LinkedList<>();
+	private final List<String> mappingFileNames = new ArrayList<>();
 
-	private List<URL> jarFileUrls = new LinkedList<>();
+	private final List<URL> jarFileUrls = new ArrayList<>();
 
 	@Nullable
 	private URL persistenceUnitRootUrl;
 
-	private final List<String> managedClassNames = new LinkedList<>();
+	private final List<String> managedClassNames = new ArrayList<>();
 
-	private final List<String> managedPackages = new LinkedList<>();
+	private final List<String> managedPackages = new ArrayList<>();
 
 	private boolean excludeUnlistedClasses = false;
 

spring-orm/src/main/java/org/springframework/orm/jpa/persistenceunit/PersistenceUnitReader.java

@@ -19,7 +19,7 @@ package org.springframework.orm.jpa.persistenceunit;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 
 import javax.persistence.SharedCacheMode;
@@ -123,7 +123,7 @@ final class PersistenceUnitReader {
 	 */
 	public SpringPersistenceUnitInfo[] readPersistenceUnitInfos(String[] persistenceXmlLocations) {
 		ErrorHandler handler = new SimpleSaxErrorHandler(logger);
-		List<SpringPersistenceUnitInfo> infos = new LinkedList<>();
+		List<SpringPersistenceUnitInfo> infos = new ArrayList<>(1);
 		String resourceLocation = null;
 		try {
 			for (String location : persistenceXmlLocations) {

spring-orm/src/main/java/org/springframework/orm/jpa/support/PersistenceAnnotationBeanPostProcessor.java

@@ -24,7 +24,6 @@ import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Properties;
@@ -403,7 +402,7 @@ public class PersistenceAnnotationBeanPostProcessor
 		Class<?> targetClass = clazz;
 
 		do {
-			final LinkedList<InjectionMetadata.InjectedElement> currElements = new LinkedList<>();
+			final List<InjectionMetadata.InjectedElement> currElements = new ArrayList<>();
 
 			ReflectionUtils.doWithLocalFields(targetClass, field -> {
 				if (field.isAnnotationPresent(PersistenceContext.class) ||

spring-test/src/main/java/org/springframework/test/web/client/AbstractRequestExpectationManager.java

@@ -18,11 +18,11 @@ package org.springframework.test.web.client;
 
 import java.io.IOException;
 import java.net.URI;
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -48,9 +48,9 @@ import org.springframework.util.Assert;
  */
 public abstract class AbstractRequestExpectationManager implements RequestExpectationManager {
 
-	private final List<RequestExpectation> expectations = new LinkedList<>();
+	private final List<RequestExpectation> expectations = new ArrayList<>();
 
-	private final List<ClientHttpRequest> requests = new LinkedList<>();
+	private final List<ClientHttpRequest> requests = new ArrayList<>();
 
 	private final Map<ClientHttpRequest, Throwable> requestFailures = new LinkedHashMap<>();
 
@@ -81,7 +81,7 @@ public abstract class AbstractRequestExpectationManager implements RequestExpect
 	@SuppressWarnings("deprecation")
 	@Override
 	public ClientHttpResponse validateRequest(ClientHttpRequest request) throws IOException {
-		RequestExpectation expectation = null;
+		RequestExpectation expectation;
 		synchronized (this.requests) {
 			if (this.requests.isEmpty()) {
 				afterExpectationsDeclared();

spring-test/src/main/java/org/springframework/test/web/client/DefaultRequestExpectation.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,7 +17,7 @@
 package org.springframework.test.web.client;
 
 import java.io.IOException;
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 
 import org.springframework.http.client.ClientHttpRequest;
@@ -36,7 +36,7 @@ public class DefaultRequestExpectation implements RequestExpectation {
 
 	private final RequestCount requestCount;
 
-	private final List<RequestMatcher> requestMatchers = new LinkedList<>();
+	private final List<RequestMatcher> requestMatchers = new ArrayList<>(1);
 
 	@Nullable
 	private ResponseCreator responseCreator;

spring-tx/src/main/java/org/springframework/transaction/config/TxAdviceBeanDefinitionParser.java

@@ -16,7 +16,7 @@
 
 package org.springframework.transaction.config;
 
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 
 import org.w3c.dom.Element;
@@ -122,14 +122,14 @@ class TxAdviceBeanDefinitionParser extends AbstractSingleBeanDefinitionParser {
 				attribute.setReadOnly(Boolean.parseBoolean(methodEle.getAttribute(READ_ONLY_ATTRIBUTE)));
 			}
 
-			List<RollbackRuleAttribute> rollbackRules = new LinkedList<>();
+			List<RollbackRuleAttribute> rollbackRules = new ArrayList<>(1);
 			if (methodEle.hasAttribute(ROLLBACK_FOR_ATTRIBUTE)) {
 				String rollbackForValue = methodEle.getAttribute(ROLLBACK_FOR_ATTRIBUTE);
-				addRollbackRuleAttributesTo(rollbackRules,rollbackForValue);
+				addRollbackRuleAttributesTo(rollbackRules, rollbackForValue);
 			}
 			if (methodEle.hasAttribute(NO_ROLLBACK_FOR_ATTRIBUTE)) {
 				String noRollbackForValue = methodEle.getAttribute(NO_ROLLBACK_FOR_ATTRIBUTE);
-				addNoRollbackRuleAttributesTo(rollbackRules,noRollbackForValue);
+				addNoRollbackRuleAttributesTo(rollbackRules, noRollbackForValue);
 			}
 			attribute.setRollbackRules(rollbackRules);
 

spring-tx/src/main/java/org/springframework/transaction/interceptor/RuleBasedTransactionAttribute.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,7 +18,6 @@ package org.springframework.transaction.interceptor;
 
 import java.io.Serializable;
 import java.util.ArrayList;
-import java.util.LinkedList;
 import java.util.List;
 
 import org.apache.commons.logging.Log;
@@ -116,7 +115,7 @@ public class RuleBasedTransactionAttribute extends DefaultTransactionAttribute i
 	 */
 	public List<RollbackRuleAttribute> getRollbackRules() {
 		if (this.rollbackRules == null) {
-			this.rollbackRules = new LinkedList<>();
+			this.rollbackRules = new ArrayList<>();
 		}
 		return this.rollbackRules;
 	}

spring-web/src/main/java/org/springframework/http/codec/multipart/PartGenerator.java

@@ -23,8 +23,8 @@ import java.nio.channels.WritableByteChannel;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.StandardOpenOption;
+import java.util.ArrayList;
 import java.util.Collection;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Queue;
 import java.util.concurrent.ConcurrentLinkedQueue;
@@ -479,7 +479,7 @@ final class PartGenerator extends BaseSubscriber<MultipartParser.Token> {
 		}
 
 		private void switchToFile(DataBuffer current, long byteCount) {
-			List<DataBuffer> content = new LinkedList<>(this.content);
+			List<DataBuffer> content = new ArrayList<>(this.content);
 			content.add(current);
 			this.releaseOnDispose = false;
 

spring-web/src/main/java/org/springframework/http/converter/json/Jackson2ObjectMapperBuilder.java

@@ -21,7 +21,6 @@ import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.LinkedHashMap;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
@@ -557,7 +556,7 @@ public class Jackson2ObjectMapperBuilder {
 	 * @see com.fasterxml.jackson.databind.Module
 	 */
 	public Jackson2ObjectMapperBuilder modules(List<Module> modules) {
-		this.modules = new LinkedList<>(modules);
+		this.modules = new ArrayList<>(modules);
 		this.findModulesViaServiceLoader = false;
 		this.findWellKnownModules = false;
 		return this;

spring-web/src/main/java/org/springframework/web/HttpRequestMethodNotSupportedException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,9 +16,9 @@
 
 package org.springframework.web;
 
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.EnumSet;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Set;
 
@@ -117,7 +117,7 @@ public class HttpRequestMethodNotSupportedException extends ServletException {
 		if (this.supportedMethods == null) {
 			return null;
 		}
-		List<HttpMethod> supportedMethods = new LinkedList<>();
+		List<HttpMethod> supportedMethods = new ArrayList<>(this.supportedMethods.length);
 		for (String value : this.supportedMethods) {
 			HttpMethod resolved = HttpMethod.resolve(value);
 			if (resolved != null) {

spring-web/src/main/java/org/springframework/web/SpringServletContainerInitializer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,7 +17,8 @@
 package org.springframework.web;
 
 import java.lang.reflect.Modifier;
-import java.util.LinkedList;
+import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.ServiceLoader;
 import java.util.Set;
@@ -142,9 +143,10 @@ public class SpringServletContainerInitializer implements ServletContainerInitia
 	public void onStartup(@Nullable Set<Class<?>> webAppInitializerClasses, ServletContext servletContext)
 			throws ServletException {
 
-		List<WebApplicationInitializer> initializers = new LinkedList<>();
+		List<WebApplicationInitializer> initializers = Collections.emptyList();
 
 		if (webAppInitializerClasses != null) {
+			initializers = new ArrayList<>(webAppInitializerClasses.size());
 			for (Class<?> waiClass : webAppInitializerClasses) {
 				// Be defensive: Some servlet containers provide us with invalid classes,
 				// no matter what @HandlesTypes says...

spring-web/src/main/java/org/springframework/web/client/RestTemplate.java

@@ -21,7 +21,6 @@ import java.lang.reflect.Type;
 import java.net.URI;
 import java.util.ArrayList;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -949,7 +948,7 @@ public class RestTemplate extends InterceptingHttpAccessor implements RestOperat
 				HttpHeaders httpHeaders = httpRequest.getHeaders();
 				HttpHeaders requestHeaders = this.requestEntity.getHeaders();
 				if (!requestHeaders.isEmpty()) {
-					requestHeaders.forEach((key, values) -> httpHeaders.put(key, new LinkedList<>(values)));
+					requestHeaders.forEach((key, values) -> httpHeaders.put(key, new ArrayList<>(values)));
 				}
 				if (httpHeaders.getContentLength() < 0) {
 					httpHeaders.setContentLength(0L);
@@ -968,7 +967,7 @@ public class RestTemplate extends InterceptingHttpAccessor implements RestOperat
 								(GenericHttpMessageConverter<Object>) messageConverter;
 						if (genericConverter.canWrite(requestBodyType, requestBodyClass, requestContentType)) {
 							if (!requestHeaders.isEmpty()) {
-								requestHeaders.forEach((key, values) -> httpHeaders.put(key, new LinkedList<>(values)));
+								requestHeaders.forEach((key, values) -> httpHeaders.put(key, new ArrayList<>(values)));
 							}
 							logBody(requestBody, requestContentType, genericConverter);
 							genericConverter.write(requestBody, requestBodyType, requestContentType, httpRequest);
@@ -977,7 +976,7 @@ public class RestTemplate extends InterceptingHttpAccessor implements RestOperat
 					}
 					else if (messageConverter.canWrite(requestBodyClass, requestContentType)) {
 						if (!requestHeaders.isEmpty()) {
-							requestHeaders.forEach((key, values) -> httpHeaders.put(key, new LinkedList<>(values)));
+							requestHeaders.forEach((key, values) -> httpHeaders.put(key, new ArrayList<>(values)));
 						}
 						logBody(requestBody, requestContentType, messageConverter);
 						((HttpMessageConverter<Object>) messageConverter).write(

spring-web/src/main/java/org/springframework/web/method/support/CompositeUriComponentsContributor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,9 +16,10 @@
 
 package org.springframework.web.method.support;
 
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 
@@ -34,11 +35,12 @@ import org.springframework.web.util.UriComponentsBuilder;
  * use for formatting method argument values to Strings.
  *
  * @author Rossen Stoyanchev
+ * @author Juergen Hoeller
  * @since 4.0
  */
 public class CompositeUriComponentsContributor implements UriComponentsContributor {
 
-	private final List<Object> contributors = new LinkedList<>();
+	private final List<Object> contributors;
 
 	private final ConversionService conversionService;
 
@@ -53,7 +55,7 @@ public class CompositeUriComponentsContributor implements UriComponentsContribut
 	 * or {@link HandlerMethodArgumentResolver HandlerMethodArgumentResolvers}.
 	 */
 	public CompositeUriComponentsContributor(UriComponentsContributor... contributors) {
-		Collections.addAll(this.contributors, contributors);
+		this.contributors = Arrays.asList((Object[]) contributors);
 		this.conversionService = new DefaultFormattingConversionService();
 	}
 
@@ -85,9 +87,7 @@ public class CompositeUriComponentsContributor implements UriComponentsContribut
 	 * need to be formatted as Strings before being added to the URI
 	 */
 	public CompositeUriComponentsContributor(@Nullable Collection<?> contributors, @Nullable ConversionService cs) {
-		if (contributors != null) {
-			this.contributors.addAll(contributors);
-		}
+		this.contributors = (contributors != null ? new ArrayList<>(contributors) : Collections.emptyList());
 		this.conversionService = (cs != null ? cs : new DefaultFormattingConversionService());
 	}
 

spring-web/src/main/java/org/springframework/web/method/support/HandlerMethodArgumentResolverComposite.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,8 @@
 
 package org.springframework.web.method.support;
 
+import java.util.ArrayList;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
@@ -38,7 +38,7 @@ import org.springframework.web.context.request.NativeWebRequest;
  */
 public class HandlerMethodArgumentResolverComposite implements HandlerMethodArgumentResolver {
 
-	private final List<HandlerMethodArgumentResolver> argumentResolvers = new LinkedList<>();
+	private final List<HandlerMethodArgumentResolver> argumentResolvers = new ArrayList<>();
 
 	private final Map<MethodParameter, HandlerMethodArgumentResolver> argumentResolverCache =
 			new ConcurrentHashMap<>(256);

spring-web/src/main/java/org/springframework/web/multipart/support/StandardServletPartUtils.java

@@ -16,7 +16,7 @@
 
 package org.springframework.web.multipart.support;
 
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 
 import javax.servlet.http.HttpServletRequest;
@@ -65,7 +65,7 @@ public abstract class StandardServletPartUtils {
 	 */
 	public static List<Part> getParts(HttpServletRequest request, String name) throws MultipartException {
 		try {
-			List<Part> parts = new LinkedList<>();
+			List<Part> parts = new ArrayList<>(1);
 			for (Part part : request.getParts()) {
 				if (part.getName().equals(name)) {
 					parts.add(part);

spring-web/src/main/java/org/springframework/web/util/UriComponentsBuilder.java

@@ -20,10 +20,11 @@ import java.net.InetSocketAddress;
 import java.net.URI;
 import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
+import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Deque;
 import java.util.HashMap;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.regex.Matcher;
@@ -908,7 +909,7 @@ public class UriComponentsBuilder implements UriBuilder, Cloneable {
 
 	private static class CompositePathComponentBuilder implements PathComponentBuilder {
 
-		private final LinkedList<PathComponentBuilder> builders = new LinkedList<>();
+		private final Deque<PathComponentBuilder> builders = new ArrayDeque<>();
 
 		public void addPathSegments(String... pathSegments) {
 			if (!ObjectUtils.isEmpty(pathSegments)) {
@@ -1024,7 +1025,7 @@ public class UriComponentsBuilder implements UriBuilder, Cloneable {
 
 	private static class PathSegmentComponentBuilder implements PathComponentBuilder {
 
-		private final List<String> pathSegments = new LinkedList<>();
+		private final List<String> pathSegments = new ArrayList<>();
 
 		public void append(String... pathSegments) {
 			for (String pathSegment : pathSegments) {

spring-web/src/main/java/org/springframework/web/util/pattern/RegexPathElement.java

@@ -16,7 +16,7 @@
 
 package org.springframework.web.util.pattern;
 
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -40,7 +40,7 @@ class RegexPathElement extends PathElement {
 	private static final String DEFAULT_VARIABLE_PATTERN = "(.*)";
 
 
-	private char[] regex;
+	private final char[] regex;
 
 	private final boolean caseSensitive;
 
@@ -48,7 +48,7 @@ class RegexPathElement extends PathElement {
 
 	private int wildcardCount;
 
-	private final List<String> variableNames = new LinkedList<>();
+	private final List<String> variableNames = new ArrayList<>();
 
 
 	RegexPathElement(int pos, char[] regex, boolean caseSensitive, char[] completePattern, char separator) {

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/HandlerMethodArgumentResolverComposite.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,8 @@
 
 package org.springframework.web.reactive.result.method;
 
+import java.util.ArrayList;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
@@ -43,7 +43,7 @@ class HandlerMethodArgumentResolverComposite implements HandlerMethodArgumentRes
 
 	protected final Log logger = LogFactory.getLog(getClass());
 
-	private final List<HandlerMethodArgumentResolver> argumentResolvers = new LinkedList<>();
+	private final List<HandlerMethodArgumentResolver> argumentResolvers = new ArrayList<>();
 
 	private final Map<MethodParameter, HandlerMethodArgumentResolver> argumentResolverCache =
 			new ConcurrentHashMap<>(256);
@@ -116,9 +116,8 @@ class HandlerMethodArgumentResolverComposite implements HandlerMethodArgumentRes
 
 		HandlerMethodArgumentResolver resolver = getArgumentResolver(parameter);
 		if (resolver == null) {
-			throw new IllegalArgumentException(
-					"Unsupported parameter type [" + parameter.getParameterType().getName() + "]." +
-							" supportsParameter should be called first.");
+			throw new IllegalArgumentException("Unsupported parameter type [" +
+					parameter.getParameterType().getName() + "]. supportsParameter should be called first.");
 		}
 		return resolver.resolveArgument(parameter, bindingContext, exchange);
 	}

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/InvocableHandlerMethod.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -86,7 +86,7 @@ public class InvocableHandlerMethod extends HandlerMethod {
 	 * Configure the argument resolvers to use to use for resolving method
 	 * argument values against a {@code ServerWebExchange}.
 	 */
-	public void setArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers) {
+	public void setArgumentResolvers(List<? extends HandlerMethodArgumentResolver> resolvers) {
 		this.resolvers.addResolvers(resolvers);
 	}
 

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/SyncInvocableHandlerMethod.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,7 +17,6 @@
 package org.springframework.web.reactive.result.method;
 
 import java.lang.reflect.Method;
-import java.util.ArrayList;
 import java.util.List;
 import java.util.stream.Collectors;
 
@@ -62,7 +61,7 @@ public class SyncInvocableHandlerMethod extends HandlerMethod {
 	 * argument values against a {@code ServerWebExchange}.
 	 */
 	public void setArgumentResolvers(List<SyncHandlerMethodArgumentResolver> resolvers) {
-		this.delegate.setArgumentResolvers(new ArrayList<>(resolvers));
+		this.delegate.setArgumentResolvers(resolvers);
 	}
 
 	/**

spring-webmvc/src/main/java/org/springframework/web/servlet/DispatcherServlet.java

@@ -23,7 +23,6 @@ import java.util.Collections;
 import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.HashSet;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
@@ -897,7 +896,7 @@ public class DispatcherServlet extends FrameworkServlet {
 			return strategies;
 		}
 		else {
-			return new LinkedList<>();
+			return Collections.emptyList();
 		}
 	}
 

spring-webmvc/src/main/java/org/springframework/web/servlet/support/AbstractFlashMapManager.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,8 @@
 
 package org.springframework.web.servlet.support;
 
+import java.util.ArrayList;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.CopyOnWriteArrayList;
@@ -127,7 +127,7 @@ public abstract class AbstractFlashMapManager implements FlashMapManager {
 	 * Return a list of expired FlashMap instances contained in the given list.
 	 */
 	private List<FlashMap> getExpiredFlashMaps(List<FlashMap> allMaps) {
-		List<FlashMap> result = new LinkedList<>();
+		List<FlashMap> result = new ArrayList<>();
 		for (FlashMap map : allMaps) {
 			if (map.isExpired()) {
 				result.add(map);
@@ -142,7 +142,7 @@ public abstract class AbstractFlashMapManager implements FlashMapManager {
 	 */
 	@Nullable
 	private FlashMap getMatchingFlashMap(List<FlashMap> allMaps, HttpServletRequest request) {
-		List<FlashMap> result = new LinkedList<>();
+		List<FlashMap> result = new ArrayList<>();
 		for (FlashMap flashMap : allMaps) {
 			if (isFlashMapForRequest(flashMap, request)) {
 				result.add(flashMap);
@@ -213,7 +213,7 @@ public abstract class AbstractFlashMapManager implements FlashMapManager {
 		}
 		else {
 			List<FlashMap> allFlashMaps = retrieveFlashMaps(request);
-			allFlashMaps = (allFlashMaps != null ? allFlashMaps : new LinkedList<>());
+			allFlashMaps = (allFlashMaps != null ? allFlashMaps : new ArrayList<>(1));
 			allFlashMaps.add(flashMap);
 			updateFlashMaps(allFlashMaps, request, response);
 		}

spring-webmvc/src/main/java/org/springframework/web/servlet/tags/MessageTag.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,9 +17,9 @@
 package org.springframework.web.servlet.tags;
 
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
-import java.util.LinkedList;
 import java.util.List;
 
 import javax.servlet.jsp.JspException;
@@ -255,7 +255,7 @@ public class MessageTag extends HtmlEscapingAwareTag implements ArgumentAware {
 
 	@Override
 	protected final int doStartTagInternal() throws JspException, IOException {
-		this.nestedArguments = new LinkedList<>();
+		this.nestedArguments = new ArrayList<>();
 		return EVAL_BODY_INCLUDE;
 	}
 

spring-webmvc/src/main/java/org/springframework/web/servlet/tags/UrlTag.java

@@ -18,9 +18,9 @@ package org.springframework.web.servlet.tags;
 
 import java.io.IOException;
 import java.nio.charset.UnsupportedCharsetException;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashSet;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Set;
 
@@ -229,7 +229,7 @@ public class UrlTag extends HtmlEscapingAwareTag implements ParamAware {
 
 	@Override
 	public int doStartTagInternal() throws JspException {
-		this.params = new LinkedList<>();
+		this.params = new ArrayList<>();
 		this.templateParams = new HashSet<>();
 		return EVAL_BODY_INCLUDE;
 	}

spring-webmvc/src/main/java/org/springframework/web/servlet/view/ResourceBundleViewResolver.java

@@ -16,8 +16,8 @@
 
 package org.springframework.web.servlet.view;
 
+import java.util.ArrayList;
 import java.util.HashMap;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
@@ -230,10 +230,9 @@ public class ResourceBundleViewResolver extends AbstractCachingViewResolver
 		}
 
 		// Build list of ResourceBundle references for Locale.
-		List<ResourceBundle> bundles = new LinkedList<>();
+		List<ResourceBundle> bundles = new ArrayList<>(this.basenames.length);
 		for (String basename : this.basenames) {
-			ResourceBundle bundle = getBundle(basename, locale);
-			bundles.add(bundle);
+			bundles.add(getBundle(basename, locale));
 		}
 
 		// Try to find cached factory for ResourceBundle list:

spring-webmvc/src/main/java/org/springframework/web/servlet/view/tiles3/TilesConfigurer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,8 @@
 
 package org.springframework.web.servlet.view.tiles3;
 
+import java.util.ArrayList;
 import java.util.Collection;
-import java.util.LinkedList;
 import java.util.List;
 
 import javax.el.ArrayELResolver;
@@ -311,7 +311,7 @@ public class TilesConfigurer implements ServletContextAware, InitializingBean, D
 		@Override
 		protected List<ApplicationResource> getSources(ApplicationContext applicationContext) {
 			if (definitions != null) {
-				List<ApplicationResource> result = new LinkedList<>();
+				List<ApplicationResource> result = new ArrayList<>();
 				for (String definition : definitions) {
 					Collection<ApplicationResource> resources = applicationContext.getResources(definition);
 					if (resources != null) {