java.lang.NullPointerException

Coderanch | Partheban Udayakumar | 3 years ago
tip
Click on the to mark the solution that helps you, Samebug will learn from it.
As a community member, you’ll be rewarded for you help.
  1. 0

    JProgressBar Client Server application

    Coderanch | 3 years ago | Partheban Udayakumar
    java.lang.NullPointerException

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at ProgressbarTest.Server.propertyChange()
    2. ProgressbarTest
      Server.propertyChange
      1. ProgressbarTest.Server.propertyChange(Server.java:82)
      1 frame
    3. Java RT
      EventDispatchThread.run
      1. java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)
      2. java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327)
      3. javax.swing.SwingWorker$SwingWorkerPropertyChangeSupport.firePropertyChange(SwingWorker.java:854)
      4. java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:263)
      5. javax.swing.SwingWorker.firePropertyChange(SwingWorker.java:676)
      6. javax.swing.SwingWorker$4.run(SwingWorker.java:501)
      7. sun.swing.AccumulativeRunnable.run(AccumulativeRunnable.java:112)
      8. javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.run(SwingWorker.java:832)
      9. sun.swing.AccumulativeRunnable.run(AccumulativeRunnable.java:112)
      10. javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.actionPerformed(SwingWorker.java:842)
      11. javax.swing.Timer.fireActionPerformed(Timer.java:312)
      12. javax.swing.Timer$DoPostEvent.run(Timer.java:244)
      13. java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
      14. java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
      15. java.awt.EventQueue.access$200(EventQueue.java:103)
      16. java.awt.EventQueue$3.run(EventQueue.java:694)
      17. java.awt.EventQueue$3.run(EventQueue.java:692)
      18. java.security.AccessController.doPrivileged(Native Method)
      19. java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
      20. java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
      21. java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
      22. java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
      23. java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
      24. java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
      25. java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
      26. java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
      26 frames