java.lang.NullPointerException

GitHub | daboross | 10 months ago
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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
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  3. 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
  4. 0

    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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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at net.glowstone.inventory.GlowMetaPotion.dataToString()
    2. net.glowstone.inventory
      GlowItemFactory.writeNbt
      1. net.glowstone.inventory.GlowMetaPotion.dataToString(GlowMetaPotion.java:191)
      2. net.glowstone.inventory.GlowMetaPotion.writeNbt(GlowMetaPotion.java:87)
      3. net.glowstone.inventory.GlowItemFactory.writeNbt(GlowItemFactory.java:80)
      3 frames
    3. net.glowstone.io
      NbtSerialization.writeInventory
      1. net.glowstone.io.nbt.NbtSerialization.writeItem(NbtSerialization.java:74)
      2. net.glowstone.io.nbt.NbtSerialization.writeInventory(NbtSerialization.java:112)
      2 frames
    4. net.glowstone.block
      TEContainer.saveNbt
      1. net.glowstone.block.entity.TEContainer.saveNbt(TEContainer.java:45)
      1 frame
    5. net.glowstone
      GlowChunk.toMessage
      1. net.glowstone.GlowChunk.toMessage(GlowChunk.java:697)
      2. net.glowstone.GlowChunk.toMessage(GlowChunk.java:616)
      2 frames
    6. net.glowstone.entity
      GlowPlayer.join
      1. net.glowstone.entity.GlowPlayer.streamBlocks(GlowPlayer.java:716)
      2. net.glowstone.entity.GlowPlayer.join(GlowPlayer.java:403)
      2 frames
    7. net.glowstone.net
      LoginStartHandler.lambda$handle$0
      1. net.glowstone.net.GlowSession.setPlayer(GlowSession.java:342)
      2. net.glowstone.net.handler.login.LoginStartHandler.lambda$handle$0(LoginStartHandler.java:56)
      2 frames
    8. Java RT
      FutureTask.run
      1. java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
      2. java.util.concurrent.FutureTask.run(FutureTask.java:266)
      2 frames
    9. net.glowstone.scheduler
      GlowScheduler.lambda$start$0
      1. net.glowstone.scheduler.GlowTask.run(GlowTask.java:167)
      2. net.glowstone.scheduler.GlowScheduler.pulse(GlowScheduler.java:152)
      3. net.glowstone.scheduler.GlowScheduler.lambda$start$0(GlowScheduler.java:83)
      3 frames
    10. Java RT
      Thread.run
      1. java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
      2. java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
      3. java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
      4. java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
      5. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
      6. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
      7. java.lang.Thread.run(Thread.java:745)
      7 frames