java.lang.RuntimeException: java.lang.NullPointerException: Root cannot be null

Stack Overflow | Nathaël Noguès | 10 months ago
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    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, bci=179

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Root Cause Analysis

  1. java.lang.NullPointerException

    Root cannot be null

    at javafx.scene.Scene.<init>()
  2. javafx.scene
    1. javafx.scene.Scene.<init>(
    2. javafx.scene.Scene.<init>(
    2 frames
  3. fr.project.gui
    1. fr.project.gui.Main.start(
    1 frame
  4. com.sun.javafx
    1. com.sun.javafx.applet.FXApplet2$
    2. com.sun.javafx.application.PlatformImpl.lambda$null$173(
    2 frames
  5. Java RT
    1. Method)
    1 frame
  6. com.sun.javafx
    1. com.sun.javafx.application.PlatformImpl.lambda$runLater$174(
    1 frame
    2. Method)
    3 frames
  8. Java RT
    1 frame