java.io.IOException: system clipboard data unavailable
   at sun.awt.windows.WClipboard.getClipboardData(WClipboard.java:0)
   at sun.awt.datatransfer.ClipboardTransferable.fetchOneFlavor(ClipboardTransferable.java:118)
   at sun.awt.datatransfer.ClipboardTransferable.<init>(ClipboardTransferable.java:97)
   at sun.awt.datatransfer.SunClipboard.getContents(SunClipboard.java:147)
   at org.netbeans.NbClipboard$GetContents.run(NbClipboard.java:416)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2036)