java.lang.NullPointerException: null

GitHub | LosD | 9 months 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
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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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    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

      null

      at org.apache.metamodel.excel.ExcelUpdateCallback.getLastRowNum()
    2. org.apache.metamodel
      ExcelInsertBuilder.execute
      1. org.apache.metamodel.excel.ExcelUpdateCallback.getLastRowNum(ExcelUpdateCallback.java:131)[MetaModel-excel-4.5.2.jar:4.5.2]
      2. org.apache.metamodel.excel.ExcelUpdateCallback.createRow(ExcelUpdateCallback.java:125)[MetaModel-excel-4.5.2.jar:4.5.2]
      3. org.apache.metamodel.excel.ExcelInsertBuilder.execute(ExcelInsertBuilder.java:52)[MetaModel-excel-4.5.2.jar:4.5.2]
      3 frames
    3. org.datacleaner.output
      AbstractMetaModelOutputWriter$1.run
      1. org.datacleaner.output.AbstractMetaModelOutputWriter$1.run(AbstractMetaModelOutputWriter.java:94)[DataCleaner-engine-core-5.0.3.jar:na]
      1 frame
    4. org.apache.metamodel
      ExcelDataContext.executeUpdate
      1. org.apache.metamodel.excel.ExcelDataContext.executeUpdate(ExcelDataContext.java:232)[MetaModel-excel-4.5.2.jar:4.5.2]
      1 frame
    5. org.datacleaner.output
      AbstractMetaModelOutputWriter.close
      1. org.datacleaner.output.AbstractMetaModelOutputWriter.flushBuffer(AbstractMetaModelOutputWriter.java:85)[DataCleaner-engine-core-5.0.3.jar:na]
      2. org.datacleaner.output.AbstractMetaModelOutputWriter.close(AbstractMetaModelOutputWriter.java:105)[DataCleaner-engine-core-5.0.3.jar:na]
      2 frames
    6. org.datacleaner.extension
      AbstractOutputWriterAnalyzer.getResult
      1. org.datacleaner.extension.output.AbstractOutputWriterAnalyzer.getResult(AbstractOutputWriterAnalyzer.java:75)[DataCleaner-writers-5.0.3.jar:na]
      2. org.datacleaner.extension.output.AbstractOutputWriterAnalyzer.getResult(AbstractOutputWriterAnalyzer.java:38)[DataCleaner-writers-5.0.3.jar:na]
      2 frames
    7. org.datacleaner.job
      TaskRunnable.run
      1. org.datacleaner.job.tasks.CollectResultsTask.execute(CollectResultsTask.java:60)[DataCleaner-engine-core-5.0.3.jar:na]
      2. org.datacleaner.job.concurrent.TaskRunnable.run(TaskRunnable.java:61)[DataCleaner-api-5.0.3.jar:na]
      2 frames
    8. Java RT
      Thread.run
      1. java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)[na:1.8.0_101]
      2. java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)[na:1.8.0_101]
      3. java.lang.Thread.run(Unknown Source)[na:1.8.0_101]
      3 frames