--- a/src/main/java/jp/ac/u_ryukyu/treevnc/server/RequestScreenThread.java	Thu May 01 18:04:39 2014 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/treevnc/server/RequestScreenThread.java	Thu May 01 19:12:05 2014 +0900
@@ -12,10 +12,22 @@
 		rfb = _rfb;
 	}
 
+	
+
+	/* (non-Javadoc)
+	 * @see java.lang.Runnable#run()
+	 * 
+	 * request full screen update every 3 second.
+	 * restart send this immediately.
+	 * nobody call this.
+	 * 
+	 */
 	public void run() {
 		while (true) {
 			try {
-				waitThread();
+				synchronized(this) {
+					wait();
+				}
 				Thread.sleep(3000);
 				rfb.writeFramebufferUpdateRequest(0, 0, protocol.getFbWidth(),
 						protocol.getFbHeight(), false);
@@ -27,14 +39,10 @@
 		}
 	}
 	
-    public synchronized void waitThread() {
-    	try{
-    		wait();
-        }catch(InterruptedException e) {
-        	e.printStackTrace();
-    	}
-    }
 
+    /**
+     * do nothing.
+     */
     public synchronized void reStart() {
     	notify();
     }