Simplify conditional statements

See gh-17779

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/BeanDefinitionLoader.java

@@ -281,11 +281,8 @@ class BeanDefinitionLoader {
 		}
 		// Nested anonymous classes are not eligible for registration, nor are groovy
 		// closures
-		if (type.getName().matches(".*\\$_.*closure.*") || type.isAnonymousClass() || type.getConstructors() == null
-				|| type.getConstructors().length == 0) {
-			return false;
-		}
-		return true;
+		return !type.getName().matches(".*\\$_.*closure.*") && !type.isAnonymousClass()
+				&& type.getConstructors() != null && type.getConstructors().length != 0;
 	}
 
 	/**

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/ApplicationPidFileWriter.java

@@ -160,7 +160,7 @@ public class ApplicationPidFileWriter implements ApplicationListener<SpringAppli
 
 	private boolean failOnWriteError(SpringApplicationEvent event) {
 		String value = getProperty(event, FAIL_ON_WRITE_ERROR_PROPERTIES);
-		return (value != null) ? Boolean.parseBoolean(value) : false;
+		return Boolean.parseBoolean(value);
 	}
 
 	private String getProperty(SpringApplicationEvent event, List<Property> candidates) {

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/bind/handler/NoUnboundElementsBindHandler.java

@@ -99,9 +99,7 @@ public class NoUnboundElementsBindHandler extends AbstractBindHandler {
 
 	private boolean isUnbound(ConfigurationPropertyName name, ConfigurationPropertyName candidate) {
 		if (name.isAncestorOf(candidate)) {
-			if (!this.boundNames.contains(candidate) && !isOverriddenCollectionElement(candidate)) {
-				return true;
-			}
+			return !this.boundNames.contains(candidate) && !isOverriddenCollectionElement(candidate);
 		}
 		return false;
 	}

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/convert/CollectionToDelimitedStringConverter.java

@@ -49,11 +49,8 @@ final class CollectionToDelimitedStringConverter implements ConditionalGenericCo
 		if (targetType == null || sourceElementType == null) {
 			return true;
 		}
-		if (this.conversionService.canConvert(sourceElementType, targetType)
-				|| sourceElementType.getType().isAssignableFrom(targetType.getType())) {
-			return true;
-		}
-		return false;
+		return this.conversionService.canConvert(sourceElementType, targetType)
+				|| sourceElementType.getType().isAssignableFrom(targetType.getType());
 	}
 
 	@Override

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/jdbc/AbstractDataSourceInitializer.java

@@ -69,11 +69,8 @@ public abstract class AbstractDataSourceInitializer {
 		if (getMode() == DataSourceInitializationMode.NEVER) {
 			return false;
 		}
-		if (getMode() == DataSourceInitializationMode.EMBEDDED
-				&& !EmbeddedDatabaseConnection.isEmbedded(this.dataSource)) {
-			return false;
-		}
-		return true;
+		return getMode() != DataSourceInitializationMode.EMBEDDED
+				|| EmbeddedDatabaseConnection.isEmbedded(this.dataSource);
 	}
 
 	/**

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/DeferredLog.java

@@ -38,42 +38,42 @@ public class DeferredLog implements Log {
 	@Override
 	public boolean isTraceEnabled() {
 		synchronized (this.lines) {
-			return (this.destination != null) ? this.destination.isTraceEnabled() : true;
+			return (this.destination == null) || this.destination.isTraceEnabled();
 		}
 	}
 
 	@Override
 	public boolean isDebugEnabled() {
 		synchronized (this.lines) {
-			return (this.destination != null) ? this.destination.isDebugEnabled() : true;
+			return (this.destination == null) || this.destination.isDebugEnabled();
 		}
 	}
 
 	@Override
 	public boolean isInfoEnabled() {
 		synchronized (this.lines) {
-			return (this.destination != null) ? this.destination.isInfoEnabled() : true;
+			return (this.destination == null) || this.destination.isInfoEnabled();
 		}
 	}
 
 	@Override
 	public boolean isWarnEnabled() {
 		synchronized (this.lines) {
-			return (this.destination != null) ? this.destination.isWarnEnabled() : true;
+			return (this.destination == null) || this.destination.isWarnEnabled();
 		}
 	}
 
 	@Override
 	public boolean isErrorEnabled() {
 		synchronized (this.lines) {
-			return (this.destination != null) ? this.destination.isErrorEnabled() : true;
+			return (this.destination == null) || this.destination.isErrorEnabled();
 		}
 	}
 
 	@Override
 	public boolean isFatalEnabled() {
 		synchronized (this.lines) {
-			return (this.destination != null) ? this.destination.isFatalEnabled() : true;
+			return (this.destination == null) || this.destination.isFatalEnabled();
 		}
 	}
 

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/UndertowServletWebServer.java

@@ -344,10 +344,7 @@ public class UndertowServletWebServer implements WebServer {
 				return false;
 			}
 			Port other = (Port) obj;
-			if (this.number != other.number) {
-				return false;
-			}
-			return true;
+			return this.number == other.number;
 		}
 
 		@Override

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/UndertowWebServer.java

@@ -275,10 +275,7 @@ public class UndertowWebServer implements WebServer {
 				return false;
 			}
 			UndertowWebServer.Port other = (UndertowWebServer.Port) obj;
-			if (this.number != other.number) {
-				return false;
-			}
-			return true;
+			return this.number == other.number;
 		}
 
 		@Override