diff --git a/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/client/AbstractXhrTransport.java b/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/client/AbstractXhrTransport.java
index e48cb99388..722ec6adf5 100644
--- a/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/client/AbstractXhrTransport.java
+++ b/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/client/AbstractXhrTransport.java
@@ -49,9 +49,7 @@ public abstract class AbstractXhrTransport implements XhrTransport {
 
 	static {
 		byte[] bytes = new byte[2048];
-		for (int i = 0; i < bytes.length; i++) {
-			bytes[i] = 'h';
-		}
+		Arrays.fill(bytes, (byte) 'h');
 		PRELUDE = new String(bytes, SockJsFrame.CHARSET);
 	}
 
diff --git a/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/handler/XhrStreamingTransportHandler.java b/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/handler/XhrStreamingTransportHandler.java
index f0ceaf9c37..7de08be9b7 100644
--- a/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/handler/XhrStreamingTransportHandler.java
+++ b/spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/handler/XhrStreamingTransportHandler.java
@@ -17,6 +17,7 @@
 package org.springframework.web.socket.sockjs.transport.handler;
 
 import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
 import java.util.Map;
 
 import org.springframework.http.MediaType;
@@ -41,9 +42,7 @@ public class XhrStreamingTransportHandler extends AbstractHttpSendingTransportHa
 	private static final byte[] PRELUDE = new byte[2049];
 
 	static {
-		for (int i = 0; i < 2048; i++) {
-			PRELUDE[i] = 'h';
-		}
+		Arrays.fill(PRELUDE, (byte) 'h');
 		PRELUDE[2048] = '\n';
 	}