src/macosx/classes/sun/lwawt/macosx/CPlatformEmbeddedFrame.java

*** 205,210 ****
--- 205,219 ----
      @Override
      public void setWindowState(int windowState) {}
  
      @Override
      public void setModalBlocked(boolean blocked) {}
+ 
+     /*
+      * The method could not be implemented due to CALayer restrictions.
+      * The exeption enforce clients not to use it.
+      */
+     @Override
+     public boolean isUnderMouse() {
+         throw new RuntimeException("Not implemented");
+     }
  }