diff --git a/proxy/frontend/core/src/main/java/org/apache/shardingsphere/proxy/frontend/CDCServer.java b/proxy/frontend/core/src/main/java/org/apache/shardingsphere/proxy/frontend/CDCServer.java
index a435fa18d1469..15023e3c4ec4f 100644
--- a/proxy/frontend/core/src/main/java/org/apache/shardingsphere/proxy/frontend/CDCServer.java
+++ b/proxy/frontend/core/src/main/java/org/apache/shardingsphere/proxy/frontend/CDCServer.java
@@ -78,11 +78,11 @@ private List<ChannelFuture> startInternal(final List<String> addresses, final in
                 .childOption(ChannelOption.TCP_NODELAY, true)
                 .handler(new LoggingHandler(LogLevel.INFO))
                 .childHandler(new CDCServerHandlerInitializer());
-        List<ChannelFuture> futures = new ArrayList<>();
-        for (String address : addresses) {
-            futures.add(bootstrap.bind(address, port).sync());
+        List<ChannelFuture> result = new ArrayList<>();
+        for (String each : addresses) {
+            result.add(bootstrap.bind(each, port).sync());
         }
-        return futures;
+        return result;
     }
     
     private void createEventLoopGroup() {
diff --git a/proxy/frontend/core/src/main/java/org/apache/shardingsphere/proxy/frontend/ShardingSphereProxy.java b/proxy/frontend/core/src/main/java/org/apache/shardingsphere/proxy/frontend/ShardingSphereProxy.java
index 5622e84cc2212..5dd39ef6a3ed5 100644
--- a/proxy/frontend/core/src/main/java/org/apache/shardingsphere/proxy/frontend/ShardingSphereProxy.java
+++ b/proxy/frontend/core/src/main/java/org/apache/shardingsphere/proxy/frontend/ShardingSphereProxy.java
@@ -68,7 +68,7 @@ private EventLoopGroup getWorkerGroup() {
     /**
      * Start ShardingSphere-Proxy.
      *
-     * @param port      port
+     * @param port port
      * @param addresses addresses
      */
     @SneakyThrows(InterruptedException.class)
@@ -104,11 +104,11 @@ public void start(final String socketPath) {
     private List<ChannelFuture> startInternal(final int port, final List<String> addresses) throws InterruptedException {
         ServerBootstrap bootstrap = new ServerBootstrap();
         initServerBootstrap(bootstrap);
-        List<ChannelFuture> futures = new ArrayList<>();
-        for (String address : addresses) {
-            futures.add(bootstrap.bind(address, port).sync());
+        List<ChannelFuture> result = new ArrayList<>();
+        for (String each : addresses) {
+            result.add(bootstrap.bind(each, port).sync());
         }
-        return futures;
+        return result;
     }
     
     private ChannelFuture startDomainSocket(final String socketPath) {
@@ -119,8 +119,8 @@ private ChannelFuture startDomainSocket(final String socketPath) {
     
     private void accept(final List<ChannelFuture> futures) throws InterruptedException {
         log.info("ShardingSphere-Proxy {} mode started successfully", ProxyContext.getInstance().getContextManager().getInstanceContext().getModeConfiguration().getType());
-        for (ChannelFuture future : futures) {
-            future.channel().closeFuture().sync();
+        for (ChannelFuture each : futures) {
+            each.channel().closeFuture().sync();
         }
     }