java.lang.NullPointerException

Oracle Community | 807551 | 1 decade ago
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    Null Pointer Exception - problem

    Oracle Community | 1 decade ago | 807551
    java.lang.NullPointerException

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at Lab8.actionPerformed()
    2. Unknown
      Lab8.actionPerformed
      1. Lab8.actionPerformed(Lab8.java:178)
      1 frame
    3. Java RT
      EventDispatchThread.run
      1. javax.swing.Timer.fireActionPerformed(Timer.java:271)
      2. javax.swing.Timer$DoPostEvent.run(Timer.java:201)
      3. java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
      4. java.awt.EventQueue.dispatchEvent(EventQueue.java:443)
      5. java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:191)
      6. java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:144)
      7. java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
      8. java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:130)
      9. java.awt.EventDispatchThread.run(EventDispatchThread.java:98)
      9 frames