diff --git a/spring-beans/src/main/java/org/springframework/beans/factory/config/DependencyDescriptor.java b/spring-beans/src/main/java/org/springframework/beans/factory/config/DependencyDescriptor.java
index d8f70578201..3e75ecb307e 100644
--- a/spring-beans/src/main/java/org/springframework/beans/factory/config/DependencyDescriptor.java
+++ b/spring-beans/src/main/java/org/springframework/beans/factory/config/DependencyDescriptor.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -279,7 +279,7 @@ public class DependencyDescriptor extends InjectionPoint implements Serializable
 	}
 
 	/**
-	 * Build a ResolvableType object for the wrapped parameter/field.
+	 * Build a {@link ResolvableType} object for the wrapped parameter/field.
 	 * @since 4.0
 	 */
 	public ResolvableType getResolvableType() {
diff --git a/spring-context/src/main/java/org/springframework/validation/ObjectError.java b/spring-context/src/main/java/org/springframework/validation/ObjectError.java
index bd1c1ff7e24..227cd083952 100644
--- a/spring-context/src/main/java/org/springframework/validation/ObjectError.java
+++ b/spring-context/src/main/java/org/springframework/validation/ObjectError.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -144,7 +144,7 @@ public class ObjectError extends DefaultMessageSourceResolvable {
 
 	@Override
 	public int hashCode() {
-		return super.hashCode() * 29 + getObjectName().hashCode();
+		return (29 * super.hashCode() + getObjectName().hashCode());
 	}
 
 	@Override
diff --git a/spring-jms/src/main/java/org/springframework/jms/connection/CachingConnectionFactory.java b/spring-jms/src/main/java/org/springframework/jms/connection/CachingConnectionFactory.java
index 0cc82077a3c..6ac602579ab 100644
--- a/spring-jms/src/main/java/org/springframework/jms/connection/CachingConnectionFactory.java
+++ b/spring-jms/src/main/java/org/springframework/jms/connection/CachingConnectionFactory.java
@@ -522,7 +522,8 @@ public class CachingConnectionFactory extends SingleConnectionFactory {
 		public boolean equals(Object other) {
 			// Effectively checking object equality as well as toString equality.
 			// On WebSphere MQ, Destination objects do not implement equals...
-			return (this == other || destinationEquals((DestinationCacheKey) other));
+			return (this == other || (other instanceof DestinationCacheKey &&
+					destinationEquals((DestinationCacheKey) other)));
 		}
 
 		@Override
@@ -590,7 +591,7 @@ public class CachingConnectionFactory extends SingleConnectionFactory {
 
 		@Override
 		public int hashCode() {
-			return 31 * super.hashCode() + ObjectUtils.nullSafeHashCode(this.selector);
+			return (31 * super.hashCode() + ObjectUtils.nullSafeHashCode(this.selector));
 		}
 
 		@Override
diff --git a/spring-messaging/src/main/java/org/springframework/messaging/handler/invocation/HandlerMethodArgumentResolverComposite.java b/spring-messaging/src/main/java/org/springframework/messaging/handler/invocation/HandlerMethodArgumentResolverComposite.java
index fa6030b149b..cb7b66d90df 100644
--- a/spring-messaging/src/main/java/org/springframework/messaging/handler/invocation/HandlerMethodArgumentResolverComposite.java
+++ b/spring-messaging/src/main/java/org/springframework/messaging/handler/invocation/HandlerMethodArgumentResolverComposite.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -28,8 +28,8 @@ import org.springframework.messaging.Message;
 
 /**
  * Resolves method parameters by delegating to a list of registered
- * {@link HandlerMethodArgumentResolver}. Previously resolved method parameters are cached
- * for faster lookups.
+ * {@link HandlerMethodArgumentResolver HandlerMethodArgumentResolvers}.
+ * Previously resolved method parameters are cached for faster lookups.
  *
  * @author Rossen Stoyanchev
  * @author Juergen Hoeller
@@ -52,28 +52,24 @@ public class HandlerMethodArgumentResolverComposite implements HandlerMethodArgu
 	}
 
 	/**
-	 * Add the given {@link HandlerMethodArgumentResolver}s.
+	 * Add the given {@link HandlerMethodArgumentResolver HandlerMethodArgumentResolvers}.
 	 * @since 4.3
 	 */
 	public HandlerMethodArgumentResolverComposite addResolvers(@Nullable HandlerMethodArgumentResolver... resolvers) {
 		if (resolvers != null) {
-			for (HandlerMethodArgumentResolver resolver : resolvers) {
-				this.argumentResolvers.add(resolver);
-			}
+			Collections.addAll(this.argumentResolvers, resolvers);
 		}
 		return this;
 	}
 
 	/**
-	 * Add the given {@link HandlerMethodArgumentResolver}s.
+	 * Add the given {@link HandlerMethodArgumentResolver HandlerMethodArgumentResolvers}.
 	 */
 	public HandlerMethodArgumentResolverComposite addResolvers(
 			@Nullable List<? extends HandlerMethodArgumentResolver> argumentResolvers) {
 
 		if (argumentResolvers != null) {
-			for (HandlerMethodArgumentResolver resolver : argumentResolvers) {
-				this.argumentResolvers.add(resolver);
-			}
+			this.argumentResolvers.addAll(argumentResolvers);
 		}
 		return this;
 	}
@@ -94,8 +90,8 @@ public class HandlerMethodArgumentResolverComposite implements HandlerMethodArgu
 
 
 	/**
-	 * Whether the given {@linkplain MethodParameter method parameter} is supported by any registered
-	 * {@link HandlerMethodArgumentResolver}.
+	 * Whether the given {@linkplain MethodParameter method parameter} is
+	 * supported by any registered {@link HandlerMethodArgumentResolver}.
 	 */
 	@Override
 	public boolean supportsParameter(MethodParameter parameter) {
@@ -103,21 +99,26 @@ public class HandlerMethodArgumentResolverComposite implements HandlerMethodArgu
 	}
 
 	/**
-	 * Iterate over registered {@link HandlerMethodArgumentResolver}s and invoke the one that supports it.
-	 * @throws IllegalStateException if no suitable {@link HandlerMethodArgumentResolver} is found.
+	 * Iterate over registered
+	 * {@link HandlerMethodArgumentResolver HandlerMethodArgumentResolvers}
+	 * and invoke the one that supports it.
+	 * @throws IllegalStateException if no suitable
+	 * {@link HandlerMethodArgumentResolver} is found.
 	 */
 	@Override
 	@Nullable
 	public Object resolveArgument(MethodParameter parameter, Message<?> message) throws Exception {
 		HandlerMethodArgumentResolver resolver = getArgumentResolver(parameter);
 		if (resolver == null) {
-			throw new IllegalStateException("Unknown parameter type [" + parameter.getParameterType().getName() + "]");
+			throw new IllegalArgumentException("Unsupported parameter type [" +
+					parameter.getParameterType().getName() + "]. supportsParameter should be called first.");
 		}
 		return resolver.resolveArgument(parameter, message);
 	}
 
 	/**
-	 * Find a registered {@link HandlerMethodArgumentResolver} that supports the given method parameter.
+	 * Find a registered {@link HandlerMethodArgumentResolver} that supports
+	 * the given method parameter.
 	 */
 	@Nullable
 	private HandlerMethodArgumentResolver getArgumentResolver(MethodParameter parameter) {
diff --git a/spring-test/src/main/java/org/springframework/test/context/web/WebMergedContextConfiguration.java b/spring-test/src/main/java/org/springframework/test/context/web/WebMergedContextConfiguration.java
index dbc4e1184a2..c0d2819afa7 100644
--- a/spring-test/src/main/java/org/springframework/test/context/web/WebMergedContextConfiguration.java
+++ b/spring-test/src/main/java/org/springframework/test/context/web/WebMergedContextConfiguration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -178,7 +178,7 @@ public class WebMergedContextConfiguration extends MergedContextConfiguration {
 	 */
 	@Override
 	public int hashCode() {
-		return super.hashCode() * 31 + this.resourceBasePath.hashCode();
+		return (31 * super.hashCode() + this.resourceBasePath.hashCode());
 	}
 
 	/**
diff --git a/spring-web/src/main/java/org/springframework/http/HttpStatus.java b/spring-web/src/main/java/org/springframework/http/HttpStatus.java
index e1bf669cd12..cbc8c434435 100644
--- a/spring-web/src/main/java/org/springframework/http/HttpStatus.java
+++ b/spring-web/src/main/java/org/springframework/http/HttpStatus.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -447,6 +447,7 @@ public enum HttpStatus {
 	 * Whether this status code is in the HTTP series
 	 * {@link org.springframework.http.HttpStatus.Series#INFORMATIONAL}.
 	 * This is a shortcut for checking the value of {@link #series()}.
+	 * @since 4.0
 	 * @see #series()
 	 */
 	public boolean is1xxInformational() {
@@ -457,6 +458,7 @@ public enum HttpStatus {
 	 * Whether this status code is in the HTTP series
 	 * {@link org.springframework.http.HttpStatus.Series#SUCCESSFUL}.
 	 * This is a shortcut for checking the value of {@link #series()}.
+	 * @since 4.0
 	 * @see #series()
 	 */
 	public boolean is2xxSuccessful() {
@@ -467,6 +469,7 @@ public enum HttpStatus {
 	 * Whether this status code is in the HTTP series
 	 * {@link org.springframework.http.HttpStatus.Series#REDIRECTION}.
 	 * This is a shortcut for checking the value of {@link #series()}.
+	 * @since 4.0
 	 * @see #series()
 	 */
 	public boolean is3xxRedirection() {
@@ -477,6 +480,7 @@ public enum HttpStatus {
 	 * Whether this status code is in the HTTP series
 	 * {@link org.springframework.http.HttpStatus.Series#CLIENT_ERROR}.
 	 * This is a shortcut for checking the value of {@link #series()}.
+	 * @since 4.0
 	 * @see #series()
 	 */
 	public boolean is4xxClientError() {
@@ -487,6 +491,7 @@ public enum HttpStatus {
 	 * Whether this status code is in the HTTP series
 	 * {@link org.springframework.http.HttpStatus.Series#SERVER_ERROR}.
 	 * This is a shortcut for checking the value of {@link #series()}.
+	 * @since 4.0
 	 * @see #series()
 	 */
 	public boolean is5xxServerError() {
diff --git a/spring-web/src/main/java/org/springframework/http/ResponseEntity.java b/spring-web/src/main/java/org/springframework/http/ResponseEntity.java
index 83dc9cc0564..c1289754060 100644
--- a/spring-web/src/main/java/org/springframework/http/ResponseEntity.java
+++ b/spring-web/src/main/java/org/springframework/http/ResponseEntity.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -166,7 +166,7 @@ public class ResponseEntity<T> extends HttpEntity<T> {
 
 	@Override
 	public int hashCode() {
-		return (super.hashCode() * 29 + ObjectUtils.nullSafeHashCode(this.status));
+		return (29 * super.hashCode() + ObjectUtils.nullSafeHashCode(this.status));
 	}
 
 	@Override
diff --git a/spring-web/src/main/java/org/springframework/http/client/reactive/ClientHttpResponseDecorator.java b/spring-web/src/main/java/org/springframework/http/client/reactive/ClientHttpResponseDecorator.java
index c113930b1a1..233ea504764 100644
--- a/spring-web/src/main/java/org/springframework/http/client/reactive/ClientHttpResponseDecorator.java
+++ b/spring-web/src/main/java/org/springframework/http/client/reactive/ClientHttpResponseDecorator.java
@@ -33,7 +33,7 @@ import org.springframework.util.MultiValueMap;
  * @since 5.0
  */
 public class ClientHttpResponseDecorator implements ClientHttpResponse {
-	
+
 	private final ClientHttpResponse delegate;
 
 
@@ -48,7 +48,7 @@ public class ClientHttpResponseDecorator implements ClientHttpResponse {
 	}
 
 
-	// ServerHttpResponse delegation methods...
+	// ClientHttpResponse delegation methods...
 
 	@Override
 	public HttpStatus getStatusCode() {
diff --git a/spring-web/src/main/java/org/springframework/web/method/support/HandlerMethodArgumentResolverComposite.java b/spring-web/src/main/java/org/springframework/web/method/support/HandlerMethodArgumentResolverComposite.java
index e8831e6f7b0..1f567865750 100644
--- a/spring-web/src/main/java/org/springframework/web/method/support/HandlerMethodArgumentResolverComposite.java
+++ b/spring-web/src/main/java/org/springframework/web/method/support/HandlerMethodArgumentResolverComposite.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -31,7 +31,8 @@ import org.springframework.web.bind.support.WebDataBinderFactory;
 import org.springframework.web.context.request.NativeWebRequest;
 
 /**
- * Resolves method parameters by delegating to a list of registered {@link HandlerMethodArgumentResolver}s.
+ * Resolves method parameters by delegating to a list of registered
+ * {@link HandlerMethodArgumentResolver HandlerMethodArgumentResolvers}.
  * Previously resolved method parameters are cached for faster lookups.
  *
  * @author Rossen Stoyanchev
@@ -57,28 +58,24 @@ public class HandlerMethodArgumentResolverComposite implements HandlerMethodArgu
 	}
 
 	/**
-	 * Add the given {@link HandlerMethodArgumentResolver}s.
+	 * Add the given {@link HandlerMethodArgumentResolver HandlerMethodArgumentResolvers}.
 	 * @since 4.3
 	 */
 	public HandlerMethodArgumentResolverComposite addResolvers(@Nullable HandlerMethodArgumentResolver... resolvers) {
 		if (resolvers != null) {
-			for (HandlerMethodArgumentResolver resolver : resolvers) {
-				this.argumentResolvers.add(resolver);
-			}
+			Collections.addAll(this.argumentResolvers, resolvers);
 		}
 		return this;
 	}
 
 	/**
-	 * Add the given {@link HandlerMethodArgumentResolver}s.
+	 * Add the given {@link HandlerMethodArgumentResolver HandlerMethodArgumentResolvers}.
 	 */
 	public HandlerMethodArgumentResolverComposite addResolvers(
 			@Nullable List<? extends HandlerMethodArgumentResolver> resolvers) {
 
 		if (resolvers != null) {
-			for (HandlerMethodArgumentResolver resolver : resolvers) {
-				this.argumentResolvers.add(resolver);
-			}
+			this.argumentResolvers.addAll(resolvers);
 		}
 		return this;
 	}
@@ -100,17 +97,20 @@ public class HandlerMethodArgumentResolverComposite implements HandlerMethodArgu
 
 
 	/**
-	 * Whether the given {@linkplain MethodParameter method parameter} is supported by any registered
-	 * {@link HandlerMethodArgumentResolver}.
+	 * Whether the given {@linkplain MethodParameter method parameter} is
+	 * supported by any registered {@link HandlerMethodArgumentResolver}.
 	 */
 	@Override
 	public boolean supportsParameter(MethodParameter parameter) {
-		return (getArgumentResolver(parameter) != null);
+		return getArgumentResolver(parameter) != null;
 	}
 
 	/**
-	 * Iterate over registered {@link HandlerMethodArgumentResolver}s and invoke the one that supports it.
-	 * @throws IllegalStateException if no suitable {@link HandlerMethodArgumentResolver} is found.
+	 * Iterate over registered
+	 * {@link HandlerMethodArgumentResolver HandlerMethodArgumentResolvers} and
+	 * invoke the one that supports it.
+	 * @throws IllegalStateException if no suitable
+	 * {@link HandlerMethodArgumentResolver} is found.
 	 */
 	@Override
 	@Nullable
@@ -119,23 +119,21 @@ public class HandlerMethodArgumentResolverComposite implements HandlerMethodArgu
 
 		HandlerMethodArgumentResolver resolver = getArgumentResolver(parameter);
 		if (resolver == null) {
-			throw new IllegalArgumentException("Unknown parameter type [" + parameter.getParameterType().getName() + "]");
+			throw new IllegalArgumentException("Unsupported parameter type [" +
+					parameter.getParameterType().getName() + "]. supportsParameter should be called first.");
 		}
 		return resolver.resolveArgument(parameter, mavContainer, webRequest, binderFactory);
 	}
 
 	/**
-	 * Find a registered {@link HandlerMethodArgumentResolver} that supports the given method parameter.
+	 * Find a registered {@link HandlerMethodArgumentResolver} that supports
+	 * the given method parameter.
 	 */
 	@Nullable
 	private HandlerMethodArgumentResolver getArgumentResolver(MethodParameter parameter) {
 		HandlerMethodArgumentResolver result = this.argumentResolverCache.get(parameter);
 		if (result == null) {
 			for (HandlerMethodArgumentResolver methodArgumentResolver : this.argumentResolvers) {
-				if (logger.isTraceEnabled()) {
-					logger.trace("Testing if argument resolver [" + methodArgumentResolver + "] supports [" +
-							parameter.getGenericParameterType() + "]");
-				}
 				if (methodArgumentResolver.supportsParameter(parameter)) {
 					result = methodArgumentResolver;
 					this.argumentResolverCache.put(parameter, result);
diff --git a/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/DefaultWebClientBuilder.java b/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/DefaultWebClientBuilder.java
index 8d25af3bf88..92d3f1d04fe 100644
--- a/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/DefaultWebClientBuilder.java
+++ b/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/DefaultWebClientBuilder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -63,11 +63,11 @@ final class DefaultWebClientBuilder implements WebClient.Builder {
 	@Nullable
 	private ClientHttpConnector connector;
 
+	private ExchangeStrategies exchangeStrategies;
+
 	@Nullable
 	private ExchangeFunction exchangeFunction;
 
-	private ExchangeStrategies exchangeStrategies;
-
 
 	public DefaultWebClientBuilder() {
 		this.exchangeStrategies = ExchangeStrategies.withDefaults();
@@ -91,8 +91,8 @@ final class DefaultWebClientBuilder implements WebClient.Builder {
 				new LinkedMultiValueMap<>(other.defaultCookies) : null);
 		this.filters = (other.filters != null ? new ArrayList<>(other.filters) : null);
 		this.connector = other.connector;
-		this.exchangeFunction = other.exchangeFunction;
 		this.exchangeStrategies = other.exchangeStrategies;
+		this.exchangeFunction = other.exchangeFunction;
 	}
 
 
@@ -155,12 +155,6 @@ final class DefaultWebClientBuilder implements WebClient.Builder {
 		return this.defaultCookies;
 	}
 
-	@Override
-	public WebClient.Builder clientConnector(ClientHttpConnector connector) {
-		this.connector = connector;
-		return this;
-	}
-
 	@Override
 	public WebClient.Builder filter(ExchangeFilterFunction filter) {
 		Assert.notNull(filter, "ExchangeFilterFunction must not be null");
@@ -182,8 +176,8 @@ final class DefaultWebClientBuilder implements WebClient.Builder {
 	}
 
 	@Override
-	public WebClient.Builder exchangeFunction(ExchangeFunction exchangeFunction) {
-		this.exchangeFunction = exchangeFunction;
+	public WebClient.Builder clientConnector(ClientHttpConnector connector) {
+		this.connector = connector;
 		return this;
 	}
 
@@ -194,6 +188,12 @@ final class DefaultWebClientBuilder implements WebClient.Builder {
 		return this;
 	}
 
+	@Override
+	public WebClient.Builder exchangeFunction(ExchangeFunction exchangeFunction) {
+		this.exchangeFunction = exchangeFunction;
+		return this;
+	}
+
 	@Override
 	public WebClient build() {
 		ExchangeFunction exchange = initExchangeFunction();
diff --git a/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/WebClient.java b/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/WebClient.java
index 581c9a6aba9..fd60e6764bd 100644
--- a/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/WebClient.java
+++ b/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/WebClient.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -49,13 +49,17 @@ import org.springframework.web.util.UriBuilderFactory;
  * <p>Use static factory methods {@link #create()} or {@link #create(String)},
  * or {@link WebClient#builder()} to prepare an instance.
  *
- * <p>For examples with a response body see
- * {@link RequestHeadersSpec#retrieve() retrieve()} and
- * {@link RequestHeadersSpec#exchange() exchange()}.
- * For examples with a request body see
- * {@link RequestBodySpec#body(Publisher, Class) body(Publisher,Class)},
- * {@link RequestBodySpec#syncBody(Object) syncBody(Object)}, and
- * {@link RequestBodySpec#body(BodyInserter) body(BodyInserter)}.
+ * <p>For examples with a response body see:
+ * <ul>
+ * <li>{@link RequestHeadersSpec#retrieve() retrieve()}
+ * <li>{@link RequestHeadersSpec#exchange() exchange()}
+ * </ul>
+ * <p>For examples with a request body see:
+ * <ul>
+ * <li>{@link RequestBodySpec#body(Publisher, Class) body(Publisher,Class)}
+ * <li>{@link RequestBodySpec#syncBody(Object) syncBody(Object)}
+ * <li>{@link RequestBodySpec#body(BodyInserter) body(BodyInserter)}
+ * </ul>
  *
  * @author Rossen Stoyanchev
  * @author Arjen Poutsma
@@ -64,57 +68,57 @@ import org.springframework.web.util.UriBuilderFactory;
 public interface WebClient {
 
 	/**
-	 * Prepare an HTTP GET request.
+	 * Start building an HTTP GET request.
 	 * @return a spec for specifying the target URL
 	 */
 	RequestHeadersUriSpec<?> get();
 
 	/**
-	 * Prepare an HTTP HEAD request.
+	 * Start building an HTTP HEAD request.
 	 * @return a spec for specifying the target URL
 	 */
 	RequestHeadersUriSpec<?> head();
 
 	/**
-	 * Prepare an HTTP POST request.
+	 * Start building an HTTP POST request.
 	 * @return a spec for specifying the target URL
 	 */
 	RequestBodyUriSpec post();
 
 	/**
-	 * Prepare an HTTP PUT request.
+	 * Start building an HTTP PUT request.
 	 * @return a spec for specifying the target URL
 	 */
 	RequestBodyUriSpec put();
 
 	/**
-	 * Prepare an HTTP PATCH request.
+	 * Start building an HTTP PATCH request.
 	 * @return a spec for specifying the target URL
 	 */
 	RequestBodyUriSpec patch();
 
 	/**
-	 * Prepare an HTTP DELETE request.
+	 * Start building an HTTP DELETE request.
 	 * @return a spec for specifying the target URL
 	 */
 	RequestHeadersUriSpec<?> delete();
 
 	/**
-	 * Prepare an HTTP OPTIONS request.
+	 * Start building an HTTP OPTIONS request.
 	 * @return a spec for specifying the target URL
 	 */
 	RequestHeadersUriSpec<?> options();
 
 	/**
-	 * Prepare a request for the specified {@code HttpMethod}.
+	 * Start building a request for the given {@code HttpMethod}.
 	 * @return a spec for specifying the target URL
 	 */
 	RequestBodyUriSpec method(HttpMethod method);
 
 
 	/**
-	 * Return a builder for a new {@code WebClient} with properties replicated
-	 * from the current {@code WebClient} instance, but without affecting it.
+	 * Return a builder to create a new {@code WebClient} whose settings are
+	 * replicated from the current {@code WebClient}.
 	 */
 	Builder mutate();
 
@@ -122,7 +126,7 @@ public interface WebClient {
 	// Static, factory methods
 
 	/**
-	 * Create a new {@code WebClient} with a Reactor Netty connector.
+	 * Create a new {@code WebClient} with Reactor Netty by default.
 	 * @see #create(String)
 	 * @see #builder()
 	 */
@@ -131,7 +135,7 @@ public interface WebClient {
 	}
 
 	/**
-	 * A variant of {@link #create()} that accepts a default base URL. For more
+	 * Variant of {@link #create()} that accepts a default base URL. For more
 	 * details see {@link Builder#baseUrl(String) Builder.baseUrl(String)}.
 	 * @param baseUrl the base URI for all requests
 	 * @see #builder()
@@ -256,19 +260,6 @@ public interface WebClient {
 		 */
 		Builder defaultCookies(Consumer<MultiValueMap<String, String>> cookiesConsumer);
 
-		/**
-		 * Configure the {@link ClientHttpConnector} to use.
-		 * <p>By default an instance of
-		 * {@link org.springframework.http.client.reactive.ReactorClientHttpConnector
-		 * ReactorClientHttpConnector} is created if this is not set. However a
-		 * shared instance may be passed instead, e.g. for use with multiple
-		 * {@code WebClient}'s targeting different base URIs.
-		 * @param connector the connector to use
-		 * @see #exchangeStrategies(ExchangeStrategies)
-		 * @see #exchangeFunction(ExchangeFunction)
-		 */
-		Builder clientConnector(ClientHttpConnector connector);
-
 		/**
 		 * Add the given filter to the filter chain.
 		 * @param filter the filter to be added to the chain
@@ -276,8 +267,8 @@ public interface WebClient {
 		Builder filter(ExchangeFilterFunction filter);
 
 		/**
-		 * Manipulate the filters with the given consumer. The
-		 * list provided to the consumer is "live", so that the consumer can be used to remove
+		 * Manipulate the filters with the given consumer. The list provided to
+		 * the consumer is "live", so that the consumer can be used to remove
 		 * filters, change ordering, etc.
 		 * @param filtersConsumer a function that consumes the filter list
 		 * @return this builder
@@ -285,34 +276,40 @@ public interface WebClient {
 		Builder filters(Consumer<List<ExchangeFilterFunction>> filtersConsumer);
 
 		/**
-		 * Provide a pre-configured {@link ExchangeFunction} instance. This is
-		 * an alternative to and effectively overrides the following:
-		 * <ul>
-		 * <li>{@link #clientConnector(ClientHttpConnector)}
-		 * <li>{@link #exchangeStrategies(ExchangeStrategies)}.
-		 * </ul>
-		 * @param exchangeFunction the exchange function to use
-		 * @see #clientConnector(ClientHttpConnector)
-		 * @see #exchangeStrategies(ExchangeStrategies)
+		 * Configure the {@link ClientHttpConnector} to use. This is useful for
+		 * plugging in and/or customizing options of the underlying HTTP client
+		 * library (e.g. SSL).
+		 * <p>By default this is set to
+		 * {@link org.springframework.http.client.reactive.ReactorClientHttpConnector
+		 * ReactorClientHttpConnector}.
+		 * @param connector the connector to use
 		 */
-		Builder exchangeFunction(ExchangeFunction exchangeFunction);
+		Builder clientConnector(ClientHttpConnector connector);
 
 		/**
 		 * Configure the {@link ExchangeStrategies} to use.
-		 * <p>By default {@link ExchangeStrategies#withDefaults()} is used.
+		 * <p>By default this is obtained from {@link ExchangeStrategies#withDefaults()}.
 		 * @param strategies the strategies to use
-		 * @see #clientConnector(ClientHttpConnector)
-		 * @see #exchangeFunction(ExchangeFunction)
 		 */
 		Builder exchangeStrategies(ExchangeStrategies strategies);
 
 		/**
-		 * Clone this {@code WebClient.Builder}
+		 * Provide an {@link ExchangeFunction} pre-configured with
+		 * {@link ClientHttpConnector} and {@link ExchangeStrategies}.
+		 * <p>This is an alternative to, and effectively overrides
+		 * {@link #clientConnector}, and {@link #exchangeStrategies}.
+		 * @param exchangeFunction the exchange function to use
+		 */
+		Builder exchangeFunction(ExchangeFunction exchangeFunction);
+
+		/**
+		 * Clone this {@code WebClient.Builder}.
 		 */
 		Builder clone();
 
 		/**
-		 * Shortcut for pre-packaged customizations to WebTest builder.
+		 * Apply the given {@code Consumer} to this builder instance.
+		 * <p>This can be useful for applying pre-packaged customizations.
 		 * @param builderConsumer the consumer to apply
 		 */
 		Builder apply(Consumer<Builder> builderConsumer);
@@ -327,6 +324,7 @@ public interface WebClient {
 
 	/**
 	 * Contract for specifying the URI for a request.
+	 * @param <S> a self reference to the spec type
 	 */
 	interface UriSpec<S extends RequestHeadersSpec<?>> {
 
@@ -359,6 +357,7 @@ public interface WebClient {
 
 	/**
 	 * Contract for specifying request headers leading up to the exchange.
+	 * @param <S> a self reference to the spec type
 	 */
 	interface RequestHeadersSpec<S extends RequestHeadersSpec<S>> {
 
@@ -387,12 +386,9 @@ public interface WebClient {
 		S cookie(String name, String value);
 
 		/**
-		 * Manipulate the request's cookies with the given consumer. The
-		 * map provided to the consumer is "live", so that the consumer can be used to
-		 * {@linkplain MultiValueMap#set(Object, Object) overwrite} existing header values,
-		 * {@linkplain MultiValueMap#remove(Object) remove} values, or use any of the other
-		 * {@link MultiValueMap} methods.
-		 * @param cookiesConsumer a function that consumes the cookies map
+		 * Provides access to every cookie declared so far with the possibility
+		 * to add, replace, or remove values.
+		 * @param cookiesConsumer the consumer to provide access to
 		 * @return this builder
 		 */
 		S cookies(Consumer<MultiValueMap<String, String>> cookiesConsumer);
@@ -422,12 +418,9 @@ public interface WebClient {
 		S header(String headerName, String... headerValues);
 
 		/**
-		 * Manipulate the request's headers with the given consumer. The
-		 * headers provided to the consumer are "live", so that the consumer can be used to
-		 * {@linkplain HttpHeaders#set(String, String) overwrite} existing header values,
-		 * {@linkplain HttpHeaders#remove(Object) remove} values, or use any of the other
-		 * {@link HttpHeaders} methods.
-		 * @param headersConsumer a function that consumes the {@code HttpHeaders}
+		 * Provides access to every header declared so far with the possibility
+		 * to add, replace, or remove values.
+		 * @param headersConsumer the consumer to provide access to
 		 * @return this builder
 		 */
 		S headers(Consumer<HttpHeaders> headersConsumer);
@@ -441,10 +434,9 @@ public interface WebClient {
 		S attribute(String name, Object value);
 
 		/**
-		 * Manipulate the request attributes with the given consumer. The attributes provided to
-		 * the consumer are "live", so that the consumer can be used to inspect attributes,
-		 * remove attributes, or use any of the other map-provided methods.
-		 * @param attributesConsumer a function that consumes the attributes
+		 * Provides access to every attribute declared so far with the
+		 * possibility to add, replace, or remove values.
+		 * @param attributesConsumer the consumer to provide access to
 		 * @return this builder
 		 */
 		S attributes(Consumer<Map<String, Object>> attributesConsumer);
@@ -474,13 +466,13 @@ public interface WebClient {
 		 *     .uri("/persons/1")
 		 *     .accept(MediaType.APPLICATION_JSON)
 		 *     .exchange()
-		 *     .flatMap(response -> response.bodyToMono(Person.class));
+		 *     .flatMap(response -&gt; response.bodyToMono(Person.class));
 		 *
 		 * Flux&lt;Person&gt; flux = client.get()
 		 *     .uri("/persons")
 		 *     .accept(MediaType.APPLICATION_STREAM_JSON)
 		 *     .exchange()
-		 *     .flatMapMany(response -> response.bodyToFlux(Person.class));
+		 *     .flatMapMany(response -&gt; response.bodyToFlux(Person.class));
 		 * </pre>
 		 * <p><strong>NOTE:</strong> You must always use one of the body or
 		 * entity methods of the response to ensure resources are released.
@@ -492,6 +484,9 @@ public interface WebClient {
 	}
 
 
+	/**
+	 * Contract for specifying request headers and body leading up to the exchange.
+	 */
 	interface RequestBodySpec extends RequestHeadersSpec<RequestBodySpec> {
 
 		/**
@@ -527,9 +522,9 @@ public interface WebClient {
 		 * {@linkplain BodyInserters#fromPublisher Publisher inserter}.
 		 * For example:
 		 * <p><pre>
-		 * Mono<Person> personMono = ... ;
+		 * Mono&lt;Person&gt; personMono = ... ;
 		 *
-		 * Mono<Void> result = client.post()
+		 * Mono&lt;Void&gt; result = client.post()
 		 *     .uri("/persons/{id}", id)
 		 *     .contentType(MediaType.APPLICATION_JSON)
 		 *     .body(personMono, Person.class)
@@ -564,7 +559,7 @@ public interface WebClient {
 		 * <p><pre class="code">
 		 * Person person = ... ;
 		 *
-		 * Mono<Void> result = client.post()
+		 * Mono&lt;Void&gt; result = client.post()
 		 *     .uri("/persons/{id}", id)
 		 *     .contentType(MediaType.APPLICATION_JSON)
 		 *     .syncBody(person)
@@ -586,13 +581,16 @@ public interface WebClient {
 	}
 
 
+	/**
+	 * Contract for specifying response operations following the exchange.
+	 */
 	interface ResponseSpec {
 
 		/**
 		 * Register a custom error function that gets invoked when the given {@link HttpStatus}
 		 * predicate applies. The exception returned from the function will be returned from
 		 * {@link #bodyToMono(Class)} and {@link #bodyToFlux(Class)}.
-		 * <p>By default, an error handler is register that throws a
+		 * <p>By default, an error handler is registered that throws a
 		 * {@link WebClientResponseException} when the response status code is 4xx or 5xx.
 		 * @param statusPredicate a predicate that indicates whether {@code exceptionFunction}
 		 * applies
@@ -648,17 +646,22 @@ public interface WebClient {
 		 * status code is 4xx or 5xx
 		 */
 		<T> Flux<T> bodyToFlux(ParameterizedTypeReference<T> typeReference);
-
 	}
 
 
+	/**
+	 * Contract for specifying request headers and URI for a request.
+	 * @param <S> a self reference to the spec type
+	 */
 	interface RequestHeadersUriSpec<S extends RequestHeadersSpec<S>>
 			extends UriSpec<S>, RequestHeadersSpec<S> {
 	}
 
 
+	/**
+	 * Contract for specifying request headers, body and URI for a request.
+	 */
 	interface RequestBodyUriSpec extends RequestBodySpec, RequestHeadersUriSpec<RequestBodySpec> {
 	}
 
-
 }