java.lang.NullPointerException

Coderanch | ronald chu | 3 years ago
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  1. 0

    Code compiles but gives error when I run it

    Coderanch | 3 years ago | ronald chu
    java.lang.NullPointerException

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at DiceRollGUI$RollButton.actionPerformed()
    2. Unknown
      DiceRollGUI$RollButton.actionPerformed
      1. DiceRollGUI$RollButton.actionPerformed(DiceRollGUI.java:46)
      1 frame
    3. Java RT
      EventDispatchThread.run
      1. javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
      2. javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
      3. javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
      4. javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
      5. javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
      6. java.awt.Component.processMouseEvent(Component.java:6505)
      7. javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
      8. java.awt.Component.processEvent(Component.java:6270)
      9. java.awt.Container.processEvent(Container.java:2229)
      10. java.awt.Component.dispatchEventImpl(Component.java:4861)
      11. java.awt.Container.dispatchEventImpl(Container.java:2287)
      12. java.awt.Component.dispatchEvent(Component.java:4687)
      13. java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
      14. java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
      15. java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
      16. java.awt.Container.dispatchEventImpl(Container.java:2273)
      17. java.awt.Window.dispatchEventImpl(Window.java:2719)
      18. java.awt.Component.dispatchEvent(Component.java:4687)
      19. java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
      20. java.awt.EventQueue.access$200(EventQueue.java:103)
      21. java.awt.EventQueue$3.run(EventQueue.java:694)
      22. java.awt.EventQueue$3.run(EventQueue.java:692)
      23. java.security.AccessController.doPrivileged(Native Method)
      24. java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
      25. java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
      26. java.awt.EventQueue$4.run(EventQueue.java:708)
      27. java.awt.EventQueue$4.run(EventQueue.java:706)
      28. java.security.AccessController.doPrivileged(Native Method)
      29. java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
      30. java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
      31. java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
      32. java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
      33. java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
      34. java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
      35. java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
      36. java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
      36 frames