java.lang.NullPointerException: Attempt to invoke virtual method 'int de.tum.in.tumcampusapp.models.ChatRoom.getId()' on a null object reference

GitHub | pfent | 5 months ago
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  1. 0

    GitHub comment 406#254233504

    GitHub | 5 months ago | pfent
    java.lang.NullPointerException: Attempt to invoke virtual method 'int de.tum.in.tumcampusapp.models.ChatRoom.getId()' on a null object reference
  2. 0

    NullPointerException: LocationManager/Calendar/DownloadService

    GitHub | 9 months ago | kordianbruck
    java.lang.NullPointerException: Attempt to invoke virtual method 'int java.util.ArrayList.size()' on a null object reference
  3. 0

    First run: Roomfinder fails

    GitHub | 10 months ago | kordianbruck
    java.lang.NullPointerException: Attempt to invoke virtual method 'int java.util.ArrayList.size()' on a null object reference
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  5. 0

    GitHub comment 425#261899637

    GitHub | 4 months ago | kordianbruck
    java.lang.NullPointerException: Attempt to invoke interface method 'int java.util.List.size()' on a null object reference
  6. 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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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'int de.tum.in.tumcampusapp.models.ChatRoom.getId()' on a null object reference

      at de.tum.in.tumcampusapp.models.managers.ChatRoomManager.join()
    2. de.tum.in
      DownloadService$1.run
      1. de.tum.in.tumcampusapp.models.managers.ChatRoomManager.join(ChatRoomManager.java:156)
      2. de.tum.in.tumcampusapp.models.managers.ChatRoomManager.onRequestCard(ChatRoomManager.java:188)
      3. de.tum.in.tumcampusapp.models.managers.CardManager.update(CardManager.java:126)
      4. de.tum.in.tumcampusapp.services.DownloadService.download(DownloadService.java:140)
      5. de.tum.in.tumcampusapp.services.DownloadService.access$000(DownloadService.java:36)
      6. de.tum.in.tumcampusapp.services.DownloadService$1.run(DownloadService.java:179)
      6 frames
    3. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:761)
      1 frame