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  1. JDK
  2. JDK-4194905

JDK118: NullPointerException is thrown continuously when moving mouse in Frame

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    • CPU:
      generic
    • OS:
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      Description


      fumihiko.iwabuchi@japan 1998-12-04

      java.lang.NullPointerException is thrown continuously when moving the cursor inside
      Frame.

      This problems happens on Solaris2.6 SPARC, Solaris X86, WindowsNT4.0 and Windows98
      with build "C".

      How to reproduce:

      1) Go to the demo directory.
      2) Run appletviewer in each directory.
         appletviewer example1.html
      3) Move the mouse inside Frame and gets the exception output continuously.

      iwabuchi@dandelion> appletviewer example1.html
      Exception occurred during event dispatching:
      java.lang.NullPointerException
              at java.awt.LightweightDispatcher.updateCursor(Container.java:1846)
              at java.awt.LightweightDispatcher.dispatchEvent(Container.java:1537)
              at java.awt.Container.dispatchEventImpl(Container.java:937)
              at java.awt.Component.dispatchEvent(Component.java:1744)
              at java.awt.EventDispatchThread.run(EventDispatchThread.java:79)
      Exception occurred during event dispatching:
      java.lang.NullPointerException
              at java.awt.LightweightDispatcher.updateCursor(Container.java:1846)
              at java.awt.LightweightDispatcher.dispatchEvent(Container.java:1537)
              at java.awt.Container.dispatchEventImpl(Container.java:937)
              at java.awt.Component.dispatchEvent(Component.java:1744)
              at java.awt.EventDispatchThread.run(EventDispatchThread.java:79)
      Exception occurred during event dispatching:
      java.lang.NullPointerException
              at java.awt.LightweightDispatcher.updateCursor(Container.java:1846)
              at java.awt.LightweightDispatcher.dispatchEvent(Container.java:1537)
              at java.awt.Container.dispatchEventImpl(Container.java:937)
              at java.awt.Component.dispatchEvent(Component.java:1744)
              at java.awt.EventDispatchThread.run(EventDispatchThread.java:79)
      Exception occurred during event dispatching:
      java.lang.NullPointerException
              at java.awt.LightweightDispatcher.updateCursor(Container.java:1846)
              at java.awt.LightweightDispatcher.dispatchEvent(Container.java:1537)
              at java.awt.Container.dispatchEventImpl(Container.java:937)
              at java.awt.Component.dispatchEvent(Component.java:1744)
              at java.awt.EventDispatchThread.run(EventDispatchThread.java:79)
      .
      .
      .
      .
      .

      If you invoke an application which uses Frame, you will have the same problem.

      Very noisy, although I'm not sure if this error output is fatal or not.

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              Reporter:
              duke J. Duke (Inactive)
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