Use String.isEmpty() instead of String.equals("")

spring-beans/src/main/java/org/springframework/beans/factory/annotation/AnnotationBeanWiringInfoResolver.java

@@ -56,7 +56,7 @@ public class AnnotationBeanWiringInfoResolver implements BeanWiringInfoResolver
 			// Autowiring by name or by type
 			return new BeanWiringInfo(annotation.autowire().value(), annotation.dependencyCheck());
 		}
-		else if (!"".equals(annotation.value())) {
+		else if (!annotation.value().isEmpty()) {
 			// Explicitly specified bean name for bean definition to take property values from
 			return new BeanWiringInfo(annotation.value(), false);
 		}

spring-test/src/main/java/org/springframework/mock/jndi/SimpleNamingContext.java

@@ -126,7 +126,7 @@ public class SimpleNamingContext implements Context {
 		if (logger.isDebugEnabled()) {
 			logger.debug("Static JNDI lookup: [" + name + "]");
 		}
-		if ("".equals(name)) {
+		if (name.isEmpty()) {
 			return new SimpleNamingContext(this.root, this.boundObjects, this.environment);
 		}
 		Object found = this.boundObjects.get(name);
@@ -306,7 +306,7 @@ public class SimpleNamingContext implements Context {
 		private Iterator<T> iterator;
 
 		private AbstractNamingEnumeration(SimpleNamingContext context, String proot) throws NamingException {
-			if (!"".equals(proot) && !proot.endsWith("/")) {
+			if (!proot.isEmpty() && !proot.endsWith("/")) {
 				proot = proot + "/";
 			}
 			String root = context.root + proot;

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

@@ -105,7 +105,7 @@ public class ServerSentEventHttpMessageReader implements HttpMessageReader<Objec
 		ResolvableType valueType = (shouldWrap ? elementType.getGeneric() : elementType);
 
 		return stringDecoder.decode(message.getBody(), STRING_TYPE, null, hints)
-				.bufferUntil(line -> line.equals(""))
+				.bufferUntil(String::isEmpty)
 				.concatMap(lines -> Mono.justOrEmpty(buildEvent(lines, valueType, shouldWrap, hints)));
 	}
 

spring-web/src/main/java/org/springframework/http/server/DefaultPathContainer.java

@@ -97,7 +97,7 @@ final class DefaultPathContainer implements PathContainer {
 
 
 	static PathContainer createFromUrlPath(String path, Options options) {
-		if (path.equals("")) {
+		if (path.isEmpty()) {
 			return EMPTY_PATH;
 		}
 		char separator = options.separator();
@@ -117,7 +117,7 @@ final class DefaultPathContainer implements PathContainer {
 		while (begin < path.length()) {
 			int end = path.indexOf(separator, begin);
 			String segment = (end != -1 ? path.substring(begin, end) : path.substring(begin));
-			if (!segment.equals("")) {
+			if (!segment.isEmpty()) {
 				elements.add(options.shouldDecodeAndParseSegments() ?
 						decodeAndParsePathSegment(segment) :
 						new DefaultPathSegment(segment, separatorElement));

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

@@ -411,8 +411,8 @@ public class PathPattern implements Comparable<PathPattern> {
 		int dotPos2 = p2string.indexOf('.');
 		String file2 = (dotPos2 == -1 ? p2string : p2string.substring(0, dotPos2));
 		String secondExtension = (dotPos2 == -1 ? "" : p2string.substring(dotPos2));
-		boolean firstExtensionWild = (firstExtension.equals(".*") || firstExtension.equals(""));
-		boolean secondExtensionWild = (secondExtension.equals(".*") || secondExtension.equals(""));
+		boolean firstExtensionWild = (firstExtension.equals(".*") || firstExtension.isEmpty());
+		boolean secondExtensionWild = (secondExtension.equals(".*") || secondExtension.isEmpty());
 		if (!firstExtensionWild && !secondExtensionWild) {
 			throw new IllegalArgumentException(
 					"Cannot combine patterns: " + this.patternString + " and " + pattern2string);