java.lang.NullPointerException

Coderanch | Thana Bujakorn | 1 decade ago
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  1. 0

    Composition

    Coderanch | 1 decade ago | Thana Bujakorn
    java.lang.NullPointerException

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at Simulator$ButtonHandler.actionPerformed()
    2. Unknown
      Simulator$ButtonHandler.actionPerformed
      1. Simulator$ButtonHandler.actionPerformed(Simulator.java:53)
      1 frame
    3. Java RT
      EventDispatchThread.run
      1. javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1450)
      2. javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1504)
      3. javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:378)
      4. javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:250)
      5. javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:216)
      6. java.awt.Component.processMouseEvent(Component.java:3715)
      7. java.awt.Component.processEvent(Component.java:3544)
      8. java.awt.Container.processEvent(Container.java:1164)
      9. java.awt.Component.dispatchEventImpl(Component.java:2593)
      10. java.awt.Container.dispatchEventImpl(Container.java:1213)
      11. java.awt.Component.dispatchEvent(Component.java:2497)
      12. java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2451)
      13. java.awt.LightweightDispatcher.processMouseEvent(Container.java:2216)
      14. java.awt.LightweightDispatcher.dispatchEvent(Container.java:2125)
      15. java.awt.Container.dispatchEventImpl(Container.java:1200)
      16. java.awt.Component.dispatchEvent(Component.java:2497)
      17. java.awt.EventQueue.dispatchEvent(EventQueue.java:339)
      18. java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:131)
      19. java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:98)
      20. java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
      21. java.awt.EventDispatchThread.run(EventDispatchThread.java:85)
      21 frames