src/java.desktop/share/classes/sun/awt/SunToolkit.java

*** 1880,1889 ****
--- 1880,1892 ----
  
      private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
  
      public synchronized void setWindowDeactivationTime(Window w, long time) {
          AppContext ctx = getAppContext(w);
+         if (ctx == null) {
+             return;
+         }
          @SuppressWarnings("unchecked")
          WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
          if (map == null) {
              map = new WeakHashMap<Window, Long>();
              ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
*** 1891,1900 ****
--- 1894,1906 ----
          map.put(w, time);
      }
  
      public synchronized long getWindowDeactivationTime(Window w) {
          AppContext ctx = getAppContext(w);
+         if (ctx == null) {
+             return -1;
+         }
          @SuppressWarnings("unchecked")
          WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
          if (map == null) {
              return -1;
          }