java.lang.NullPointerException: null

GitHub | martbhell | 2 years ago
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    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 | 2 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

      null

      at edu.uchicago.monitor.MonitorChannelHandler.handleDownstream()
    2. edu.uchicago.monitor
      MonitorChannelHandler.handleDownstream
      1. edu.uchicago.monitor.MonitorChannelHandler.handleDownstream(MonitorChannelHandler.java:259)[monitor-5.0.9.jar:na]
      1 frame
    3. Netty
      DefaultChannelPipeline$DefaultChannelHandlerContext.sendDownstream
      1. org.jboss.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:591)[netty-3.9.4.Final.jar:na]
      2. org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendDownstream(DefaultChannelPipeline.java:784)[netty-3.9.4.Final.jar:na]
      2 frames
    4. org.dcache.xrootd
      ChunkedResponseWriteHandler.handleDownstream
      1. org.dcache.xrootd.stream.ChunkedResponseWriteHandler.handleDownstream(ChunkedResponseWriteHandler.java:106)[xrootd4j-1.3.7.jar:1.3.7]
      1 frame
    5. Netty
      AbstractChannel.write
      1. org.jboss.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:591)[netty-3.9.4.Final.jar:na]
      2. org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendDownstream(DefaultChannelPipeline.java:784)[netty-3.9.4.Final.jar:na]
      3. org.jboss.netty.channel.SimpleChannelHandler.writeRequested(SimpleChannelHandler.java:292)[netty-3.9.4.Final.jar:na]
      4. org.jboss.netty.channel.SimpleChannelHandler.handleDownstream(SimpleChannelHandler.java:254)[netty-3.9.4.Final.jar:na]
      5. org.jboss.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:591)[netty-3.9.4.Final.jar:na]
      6. org.jboss.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:582)[netty-3.9.4.Final.jar:na]
      7. org.jboss.netty.channel.Channels.write(Channels.java:704)[netty-3.9.4.Final.jar:na]
      8. org.jboss.netty.channel.Channels.write(Channels.java:671)[netty-3.9.4.Final.jar:na]
      9. org.jboss.netty.channel.AbstractChannel.write(AbstractChannel.java:248)[netty-3.9.4.Final.jar:na]
      9 frames
    6. org.dcache.xrootd
      XrootdRequestHandler.messageReceived
      1. org.dcache.xrootd.core.XrootdRequestHandler.respond(XrootdRequestHandler.java:201)[xrootd4j-1.3.7.jar:1.3.7]
      2. org.dcache.xrootd.core.XrootdRequestHandler.requestReceived(XrootdRequestHandler.java:174)[xrootd4j-1.3.7.jar:1.3.7]
      3. org.dcache.xrootd.core.XrootdRequestHandler.messageReceived(XrootdRequestHandler.java:77)[xrootd4j-1.3.7.jar:1.3.7]
      3 frames
    7. Netty
      DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream
      1. org.jboss.netty.channel.SimpleChannelHandler.handleUpstream(SimpleChannelHandler.java:88)[netty-3.9.4.Final.jar:na]
      2. org.jboss.netty.handler.timeout.IdleStateAwareChannelHandler.handleUpstream(IdleStateAwareChannelHandler.java:36)[netty-3.9.4.Final.jar:na]
      3. org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)[netty-3.9.4.Final.jar:na]
      4. org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)[netty-3.9.4.Final.jar:na]
      4 frames
    8. org.dcache.xrootd
      ChunkedResponseWriteHandler.handleUpstream
      1. org.dcache.xrootd.stream.ChunkedResponseWriteHandler.handleUpstream(ChunkedResponseWriteHandler.java:139)[xrootd4j-1.3.7.jar:1.3.7]
      1 frame
    9. Netty
      SimpleChannelHandler.handleUpstream
      1. org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)[netty-3.9.4.Final.jar:na]
      2. org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)[netty-3.9.4.Final.jar:na]
      3. org.jboss.netty.handler.timeout.IdleStateHandler.messageReceived(IdleStateHandler.java:294)[netty-3.9.4.Final.jar:na]
      4. org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)[netty-3.9.4.Final.jar:na]
      5. org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)[netty-3.9.4.Final.jar:na]
      6. org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)[netty-3.9.4.Final.jar:na]
      7. org.jboss.netty.channel.SimpleChannelHandler.messageReceived(SimpleChannelHandler.java:142)[netty-3.9.4.Final.jar:na]
      8. org.jboss.netty.channel.SimpleChannelHandler.handleUpstream(SimpleChannelHandler.java:88)[netty-3.9.4.Final.jar:na]
      8 frames
    10. edu.uchicago.monitor
      MonitorChannelHandler.handleUpstream
      1. edu.uchicago.monitor.MonitorChannelHandler.handleUpstream(MonitorChannelHandler.java:207)[monitor-5.0.9.jar:na]
      1 frame
    11. Netty
      SimpleChannelUpstreamHandler.messageReceived
      1. org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)[netty-3.9.4.Final.jar:na]
      2. org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)[netty-3.9.4.Final.jar:na]
      3. org.jboss.netty.channel.SimpleChannelUpstreamHandler.messageReceived(SimpleChannelUpstreamHandler.java:124)[netty-3.9.4.Final.jar:na]
      3 frames
    12. org.dcache.xrootd
      XrootdHandshakeHandler.messageReceived
      1. org.dcache.xrootd.core.XrootdHandshakeHandler.messageReceived(XrootdHandshakeHandler.java:102)[xrootd4j-1.3.7.jar:1.3.7]
      1 frame
    13. Netty
      OrderedMemoryAwareThreadPoolExecutor$ChildExecutor.run
      1. org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)[netty-3.9.4.Final.jar:na]
      2. org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)[netty-3.9.4.Final.jar:na]
      3. org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)[netty-3.9.4.Final.jar:na]
      4. org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296)[netty-3.9.4.Final.jar:na]
      5. org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:462)[netty-3.9.4.Final.jar:na]
      6. org.jboss.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:443)[netty-3.9.4.Final.jar:na]
      7. org.jboss.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:303)[netty-3.9.4.Final.jar:na]
      8. org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)[netty-3.9.4.Final.jar:na]
      9. org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)[netty-3.9.4.Final.jar:na]
      10. org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)[netty-3.9.4.Final.jar:na]
      11. org.jboss.netty.channel.SimpleChannelHandler.messageReceived(SimpleChannelHandler.java:142)[netty-3.9.4.Final.jar:na]
      12. org.jboss.netty.channel.SimpleChannelHandler.handleUpstream(SimpleChannelHandler.java:88)[netty-3.9.4.Final.jar:na]
      13. org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)[netty-3.9.4.Final.jar:na]
      14. org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)[netty-3.9.4.Final.jar:na]
      15. org.jboss.netty.handler.execution.ChannelUpstreamEventRunnable.doRun(ChannelUpstreamEventRunnable.java:43)[netty-3.9.4.Final.jar:na]
      16. org.jboss.netty.handler.execution.ChannelEventRunnable.run(ChannelEventRunnable.java:67)[netty-3.9.4.Final.jar:na]
      17. org.jboss.netty.handler.execution.OrderedMemoryAwareThreadPoolExecutor$ChildExecutor.run(OrderedMemoryAwareThreadPoolExecutor.java:314)[netty-3.9.4.Final.jar:na]
      17 frames
    14. Java RT
      ThreadPoolExecutor$Worker.run
      1. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)[na:1.7.0_79]
      2. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)[na:1.7.0_79]
      2 frames
    15. org.dcache.util
      CDCThreadFactory$1.run
      1. org.dcache.util.CDCThreadFactory$1.run(CDCThreadFactory.java:53)[dcache-core-2.10.34.jar:2.10.34]
      1 frame
    16. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:745)[na:1.7.0_79]
      1 frame