java.lang.NullPointerException

Stack Overflow | Steve | 9 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 org.jivesoftware.smack.util.stringencoder.Base64.encode()
    2. org.jivesoftware.smack
      Base64.encodeToString
      1. org.jivesoftware.smack.util.stringencoder.Base64.encode(Base64.java:64)
      2. org.jivesoftware.smack.util.stringencoder.Base64.encode(Base64.java:60)
      3. org.jivesoftware.smack.util.stringencoder.Base64.encodeToString(Base64.java:42)
      3 frames
    3. Smack
      SASLAuthentication.authenticate
      1. org.jivesoftware.smack.sasl.SASLMechanism.authenticate(SASLMechanism.java:199)
      2. org.jivesoftware.smack.sasl.SASLMechanism.authenticate(SASLMechanism.java:169)
      3. org.jivesoftware.smack.SASLAuthentication.authenticate(SASLAuthentication.java:236)
      3 frames
    4. org.jivesoftware.smack
      XMPPTCPConnection.loginNonAnonymously
      1. org.jivesoftware.smack.tcp.XMPPTCPConnection.loginNonAnonymously(XMPPTCPConnection.java:365)
      1 frame
    5. Smack
      AbstractXMPPConnection.login
      1. org.jivesoftware.smack.AbstractXMPPConnection.login(AbstractXMPPConnection.java:452)
      2. org.jivesoftware.smack.AbstractXMPPConnection.login(AbstractXMPPConnection.java:427)
      2 frames
    6. com.lets.dothis
      XMPP$XMPPConnectionListener.connected
      1. com.lets.dothis.myapplication.XMPP.login(XMPP.java:180)
      2. com.lets.dothis.myapplication.XMPP$XMPPConnectionListener.connected(XMPP.java:206)
      2 frames
    7. Smack
      AbstractXMPPConnection.callConnectionConnectedListener
      1. org.jivesoftware.smack.AbstractXMPPConnection.callConnectionConnectedListener(AbstractXMPPConnection.java:1152)
      1 frame
    8. org.jivesoftware.smack
      XMPPTCPConnection.connectInternal
      1. org.jivesoftware.smack.tcp.XMPPTCPConnection.connectInternal(XMPPTCPConnection.java:841)
      1 frame
    9. Smack
      AbstractXMPPConnection.connect
      1. org.jivesoftware.smack.AbstractXMPPConnection.connect(AbstractXMPPConnection.java:360)
      1 frame
    10. com.lets.dothis
      XMPP$1.run
      1. com.lets.dothis.myapplication.XMPP$1.run(XMPP.java:150)
      1 frame
    11. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:856)
      1 frame