--- old/src/share/classes/java/awt/Window.java	2012-02-22 15:35:09.408859700 +0400
+++ new/src/share/classes/java/awt/Window.java	2012-02-22 15:35:08.626814900 +0400
@@ -226,7 +226,8 @@
     static boolean systemSyncLWRequests = false;
     boolean     syncLWRequests = false;
     transient boolean beforeFirstShow = true;
-
+    private transient boolean disposing = false;
+    
     static final int OPENED = 0x01;
 
     /**
@@ -1162,6 +1163,7 @@
     void doDispose() {
     class DisposeAction implements Runnable {
         public void run() {
+            disposing = true;
             // Check if this window is the fullscreen window for the
             // device. Exit the fullscreen mode prior to disposing
             // of the window if that's the case.
@@ -1192,6 +1194,7 @@
                 }
             }
             clearCurrentFocusCycleRootOnHide();
+            disposing = false;
         }
     }
         DisposeAction action = new DisposeAction();
@@ -2734,6 +2737,10 @@
         return visible;
     }
 
+    boolean isDisposing() {
+        return disposing;
+    }
+
     /**
      * @deprecated As of J2SE 1.4, replaced by
      * {@link Component#applyComponentOrientation Component.applyComponentOrientation}.