java.lang.RuntimeException: Unable to start activity ComponentInfo{benlab.app1ben/benlab.app1ben.game_page}: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.util.Random.nextInt()' on a null object reference

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    Attempt to invoke virtual method 'int java.util.Random.nextInt(int)' on a null object reference

    Stack Overflow | 4 months ago | President Camacho
    java.lang.RuntimeException: Unable to start activity ComponentInfo{benlab.app1ben/benlab.app1ben.game_page}: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.util.Random.nextInt()' on a null object reference

    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'int java.util.Random.nextInt()' on a null object reference

      at benlab.app1ben.game_page.newProblem()
    2. benlab.app1ben
      game_page.onCreate
      1. benlab.app1ben.game_page.newProblem(game_page.java:47)
      2. benlab.app1ben.game_page.onCreate(game_page.java:33)
      2 frames
    3. Android Platform
      ActivityThread.main
      1. android.app.Activity.performCreate(Activity.java:6285)
      2. android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
      3. android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417)
      4. android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2524)
      5. android.app.ActivityThread.access$900(ActivityThread.java:154)
      6. android.app.ActivityThread$H.handleMessage(ActivityThread.java:1391)
      7. android.os.Handler.dispatchMessage(Handler.java:102)
      8. android.os.Looper.loop(Looper.java:234)
      9. android.app.ActivityThread.main(ActivityThread.java:5526)
      9 frames
    4. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      1 frame
    5. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
      2 frames