java.lang.NullPointerException

GitHub | KMax | 2 years ago
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    The proxy service crashes at the boot time with NPE

    GitHub | 2 years ago | KMax
    java.lang.NullPointerException
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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
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    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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    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 ru.semiot.platform.deviceproxyservice.manager.WAMPClient.publish()
    2. ru.semiot.platform
      DeviceHandler.channelRead0
      1. ru.semiot.platform.deviceproxyservice.manager.WAMPClient.publish(WAMPClient.java:38)
      2. ru.semiot.platform.deviceproxyservice.manager.DeviceManagerImpl.publish(DeviceManagerImpl.java:112)
      3. ru.semiot.platform.drivers.winghouse.machinetool.DeviceDriverImpl.publish(DeviceDriverImpl.java:120)
      4. ru.semiot.platform.drivers.winghouse.machinetool.DeviceHandler.sendMessage(DeviceHandler.java:83)
      5. ru.semiot.platform.drivers.winghouse.machinetool.DeviceHandler.processingPacket(DeviceHandler.java:48)
      6. ru.semiot.platform.drivers.winghouse.machinetool.DeviceHandler.channelRead0(DeviceHandler.java:30)
      7. ru.semiot.platform.drivers.winghouse.machinetool.DeviceHandler.channelRead0(DeviceHandler.java:12)
      7 frames
    3. Netty
      DefaultThreadFactory$DefaultRunnableDecorator.run
      1. io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
      2. io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308)
      3. io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294)
      4. io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:846)
      5. io.netty.channel.nio.AbstractNioMessageChannel$NioMessageUnsafe.read(AbstractNioMessageChannel.java:93)
      6. io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
      7. io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
      8. io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
      9. io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
      10. io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:110)
      11. io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
      11 frames
    4. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:745)
      1 frame