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    Root Cause Analysis

    1. java.lang.NullPointerException

      disposed component

      at sun.awt.windows.Win32SurfaceData.initOps()
    2. Java RT
      Window.show
      1. sun.awt.windows.Win32SurfaceData.initOps(Native Method)
      2. sun.awt.windows.Win32SurfaceData.<init>(Win32SurfaceData.java:450)
      3. sun.awt.windows.Win32SurfaceData.createData(Win32SurfaceData.java:326)
      4. sun.awt.windows.WComponentPeer.<init>(WComponentPeer.java:510)
      5. sun.awt.windows.WLabelPeer.<init>(WLabelPeer.java:42)
      6. sun.awt.windows.WToolkit.createLabel(WToolkit.java:311)
      7. java.awt.Label.addNotify(Label.java:171)
      8. java.awt.Container.addNotify(Container.java:2049)
      9. java.awt.Panel.addNotify(Panel.java:71)
      10. java.awt.Container.addNotify(Container.java:2049)
      11. java.awt.Panel.addNotify(Panel.java:71)
      12. java.awt.Container.addNotify(Container.java:2049)
      13. java.awt.Window.addNotify(Window.java:418)
      14. java.awt.Frame.addNotify(Frame.java:482)
      15. java.awt.Window.show(Window.java:459)
      15 frames
    3. Unknown
      GridExample.main
      1. GridExample.main(GridExample.java:38)
      1 frame