java.lang.NullPointerException

Oracle Community | 807555 | 2 decades ago
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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at java.awt.dnd.DropTarget.addNotify()
    2. Java RT
      JComponent.setVisible
      1. java.awt.dnd.DropTarget.addNotify(DropTarget.java:431)
      2. java.awt.Component.addNotify(Component.java:4044)
      3. java.awt.Container.addNotify(Container.java:1572)
      4. javax.swing.JComponent.addNotify(JComponent.java:3500)
      5. java.awt.Container.addNotify(Container.java:1579)
      6. javax.swing.JComponent.addNotify(JComponent.java:3500)
      7. java.awt.Container.addNotify(Container.java:1579)
      8. javax.swing.JComponent.addNotify(JComponent.java:3500)
      9. java.awt.Container.addNotify(Container.java:1579)
      10. java.awt.Container.addNotify(Container.java:1579)
      11. javax.swing.JComponent.addNotify(JComponent.java:3500)
      12. java.awt.Container.addNotify(Container.java:1579)
      13. java.awt.Container.addNotify(Container.java:1579)
      14. javax.swing.JComponent.addNotify(JComponent.java:3500)
      15. java.awt.Container.addNotify(Container.java:1579)
      16. javax.swing.JComponent.addNotify(JComponent.java:3500)
      17. java.awt.Container.addNotify(Container.java:1579)
      18. javax.swing.JComponent.addNotify(JComponent.java:3500)
      19. java.awt.Container.addNotify(Container.java:1579)
      20. javax.swing.JComponent.addNotify(JComponent.java:3500)
      21. javax.swing.JRootPane.addNotify(JRootPane.java:483)
      22. java.awt.Container.addNotify(Container.java:1579)
      23. javax.swing.JComponent.addNotify(JComponent.java:3500)
      24. java.awt.Container.addNotify(Container.java:1579)
      25. javax.swing.JComponent.addNotify(JComponent.java:3500)
      26. javax.swing.JInternalFrame.show(JInternalFrame.java:1459)
      27. java.awt.Component.show(Component.java:946)
      28. java.awt.Component.setVisible(Component.java:903)
      29. javax.swing.JComponent.setVisible(JComponent.java:1833)
      29 frames
    3. Unknown
      MOFASmockup.main
      1. MOFASmockup.<init>(MOFASmockup.java:60)
      2. MOFASmockup.main(MOFASmockup.java:415)
      2 frames