A couple of trivial simplifications

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

@@ -154,7 +154,6 @@ final class JdkDynamicAopProxy implements AopProxy, InvocationHandler, Serializa
 	@Override
 	@Nullable
 	public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
-		MethodInvocation invocation;
 		Object oldProxy = null;
 		boolean setProxyContext = false;
 
@@ -207,7 +206,7 @@ final class JdkDynamicAopProxy implements AopProxy, InvocationHandler, Serializa
 			}
 			else {
 				// We need to create a method invocation...
-				invocation = new ReflectiveMethodInvocation(proxy, target, method, args, targetClass, chain);
+				MethodInvocation invocation = new ReflectiveMethodInvocation(proxy, target, method, args, targetClass, chain);
 				// Proceed to the joinpoint through the interceptor chain.
 				retVal = invocation.proceed();
 			}

spring-beans/src/main/java/org/springframework/beans/TypeConverterDelegate.java

@@ -522,8 +522,7 @@ class TypeConverterDelegate {
 			return original;
 		}
 
-		int i = 0;
-		for (; it.hasNext(); i++) {
+		for (int i = 0; it.hasNext(); i++) {
 			Object element = it.next();
 			String indexedPropertyName = buildIndexedPropertyName(propertyName, i);
 			Object convertedElement = convertIfNecessary(indexedPropertyName, null, element,

spring-expression/src/main/java/org/springframework/expression/spel/ast/Projection.java

@@ -92,12 +92,11 @@ public class Projection extends SpelNodeImpl {
 					(Iterable<?>) operand : Arrays.asList(ObjectUtils.toObjectArray(operand)));
 
 			List<Object> result = new ArrayList<>();
-			int idx = 0;
 			Class<?> arrayElementType = null;
 			for (Object element : data) {
 				try {
 					state.pushActiveContextObject(new TypedValue(element));
-					state.enterScope("index", idx);
+					state.enterScope("index", result.size());
 					Object value = this.children[0].getValueInternal(state).getValue();
 					if (value != null && operandIsArray) {
 						arrayElementType = determineCommonType(arrayElementType, value.getClass());
@@ -108,7 +107,6 @@ public class Projection extends SpelNodeImpl {
 					state.exitScope();
 					state.popActiveContextObject();
 				}
-				idx++;
 			}
 
 			if (operandIsArray) {

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/support/AbstractSockJsService.java

@@ -354,7 +354,7 @@ public abstract class AbstractSockJsService implements SockJsService, CorsConfig
 		String requestInfo = (logger.isDebugEnabled() ? request.getMethod() + " " + request.getURI() : null);
 
 		try {
-			if (sockJsPath.equals("") || sockJsPath.equals("/")) {
+			if (sockJsPath.isEmpty() || sockJsPath.equals("/")) {
 				if (requestInfo != null) {
 					logger.debug("Processing transport request: " + requestInfo);
 				}