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

*** 108,113 ****
--- 108,121 ----
      // no-op. This appears to be win32 specific. Filed 4048790 for investigation
      //protected Transferable createLocaleTransferable(long[] formats) throws IOException;
  
      public native void declareTypes(long[] formats, SunClipboard newOwner);
      public native void setData(byte[] data, long format);
+ 
+     /**
+      * Invokes native check whether a change count on the general pasteboard is different
+      * than when we set it. The different count value means the current owner lost
+      * pasteboard ownership and someone else put data on the clipboard.
+      * @since 1.7
+      */
+     public native void checkPasteboard();
  }