java.lang.NullPointerException

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  1. 0

    Getting a nullpointer exception when switching displayables in J2ME

    Stack Overflow | 6 years ago | Pallinder
    java.lang.NullPointerException: 0 at javax.microedition.lcdui.Display$ChameleonTunnel.callScreenListener(), bci=46 at com.sun.midp.chameleon.layers.SoftButtonLayer.processCommand(), bci=74 at com.sun.midp.chameleon.layers.SoftButtonLayer.soft1(), bci=37 at com.sun.midp.chameleon.layers.SoftButtonLayer.keyInput(), bci=36 at com.sun.midp.chameleon.CWindow.keyInput(), bci=38 at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handleKeyEvent(), bci=17 at com.sun.midp.lcdui.DisplayEventListener.process(), bci=277 at com.sun.midp.events.EventQueue.run(), bci=179
  2. 0

    J2ME (Java) - Null Pointer Exception caught in Display Class

    Stack Overflow | 6 years ago | Tom
    java.lang.NullPointerException: 0 at javax.microedition.lcdui.Display$ChameleonTunnel.callScreenListener(), bci=46 at com.sun.midp.chameleon.layers.SoftButtonLayer.processCommand(), bci=74 at com.sun.midp.chameleon.layers.SoftButtonLayer.soft1(), bci=37 at com.sun.midp.chameleon.layers.SoftButtonLayer.keyInput(), bci=36 at com.sun.midp.chameleon.CWindow.keyInput(), bci=38 at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handleKeyEvent(), bci=17 at com.sun.midp.lcdui.DisplayEventListener.process(), bci=277 at com.sun.midp.events.EventQueue.run(), bci=179
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    Cloud Foundry v2 in Grails

    Stack Overflow | 3 years ago | angelo087
    java.lang.NullPointerException: Cannot invoke method getAt() on null object
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    NullPointerException in MIDlet with left soft key

    Stack Overflow | 6 years ago | berry120
    java.lang.NullPointerException: 0 at javax.microedition.lcdui.Display$ChameleonTunnel.callItemListener(), bci=57 at com.sun.midp.chameleon.layers.SoftButtonLayer.processCommand(), bci=57 at com.sun.midp.chameleon.layers.SoftButtonLayer.soft1(), bci=37 at com.sun.midp.chameleon.layers.SoftButtonLayer.keyInput(), bci=36 at com.sun.midp.chameleon.CWindow.keyInput(), bci=38 at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handleKeyEvent(), bci=17 at com.sun.midp.lcdui.DisplayEventListener.process(), bci=277 at com.sun.midp.events.EventQueue.run(), bci=179

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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at org.atmosphere.samples.chat.ChatAtmosphereHandler.onEvent()
    2. org.atmosphere.samples
      ChatAtmosphereHandler.onEvent
      1. org.atmosphere.samples.chat.ChatAtmosphereHandler.onEvent(ChatAtmosphereHandler.java:96)
      1 frame
    3. atmosphere-runtime
      AtmosphereServlet.service
      1. org.atmosphere.cpr.WebContainer.action(WebContainer.java:115)
      2. org.atmosphere.cpr.WebContainer.suspended(WebContainer.java:93)
      3. org.atmosphere.container.JettyCometSupport.service(JettyCometSupport.java:89)
      4. org.atmosphere.cpr.AtmosphereServlet.service(AtmosphereServlet.java:310)
      4 frames
    4. JavaServlet
      HttpServlet.service
      1. javax.servlet.http.HttpServlet.service(HttpServlet.java:844)
      1 frame
    5. Glassfish Core
      StandardPipeline.invoke
      1. org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1518)
      2. org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:277)
      3. org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:171)
      4. org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:651)
      5. org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:591)
      5 frames
    6. Glassfish
      PESessionLockingStandardPipeline.invoke
      1. com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
      2. com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:87)
      2 frames
    7. Glassfish Core
      CoyoteAdapter.service
      1. org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:158)
      2. org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:651)
      3. org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:591)
      4. org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:318)
      5. org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:222)
      5 frames
    8. Kernel Classes
      ContainerMapper.service
      1. com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)
      1 frame
    9. Grizzly WS
      ProcessorTask.invokeAdapter
      1. com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:803)
      1 frame
    10. grizzly-comet
      CometAsyncFilter.doFilter
      1. com.sun.grizzly.comet.CometEngine.executeServlet(CometEngine.java:469)
      2. com.sun.grizzly.comet.CometEngine.handle(CometEngine.java:338)
      3. com.sun.grizzly.comet.CometAsyncFilter.doFilter(CometAsyncFilter.java:84)
      3 frames
    11. Grizzly WS
      AbstractThreadPool$Worker.run
      1. com.sun.grizzly.arp.DefaultAsyncExecutor.invokeFilters(DefaultAsyncExecutor.java:164)
      2. com.sun.grizzly.arp.DefaultAsyncExecutor.interrupt(DefaultAsyncExecutor.java:140)
      3. com.sun.grizzly.arp.AsyncProcessorTask.doTask(AsyncProcessorTask.java:90)
      4. com.sun.grizzly.http.TaskBase.run(TaskBase.java:190)
      5. com.sun.grizzly.http.TaskBase.execute(TaskBase.java:172)
      6. com.sun.grizzly.arp.DefaultAsyncHandler.handle(DefaultAsyncHandler.java:142)
      7. com.sun.grizzly.arp.AsyncProtocolFilter.execute(AsyncProtocolFilter.java:174)
      8. com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
      9. com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
      10. com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
      11. com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
      12. com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
      13. com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
      14. com.sun.grizzly.ContextTask.run(ContextTask.java:69)
      15. com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:526)
      16. com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:507)
      16 frames
    12. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:662)
      1 frame