diff --git a/java-servlet-json/src/main/java/com/hmkcode/JSONServlet.java b/java-servlet-json/src/main/java/com/hmkcode/JSONServlet.java
index afccf9b4..24484ce2 100644
--- a/java-servlet-json/src/main/java/com/hmkcode/JSONServlet.java
+++ b/java-servlet-json/src/main/java/com/hmkcode/JSONServlet.java
@@ -29,7 +29,7 @@ protected void doPost(HttpServletRequest request, HttpServletResponse response)
 	    
 		// 1. get received JSON data from request
 		BufferedReader br = new BufferedReader(new InputStreamReader(request.getInputStream()));
-		String json = "";
+		//String json = "";
 		if(br != null){
 			json = br.readLine();
 		}