java.lang.NullPointerException: Attempt to invoke interface method 'java.util.Iterator java.util.Set.iterator()' on a null object reference

Stack Overflow | frogleaf | 5 months ago
  1. 0

    getStringSet() returning null , despite setting default preferences

    Stack Overflow | 5 months ago | frogleaf
    java.lang.NullPointerException: Attempt to invoke interface method 'java.util.Iterator java.util.Set.iterator()' on a null object reference
  2. 0

    GitHub comment 127#246163303

    GitHub | 3 months ago | legendtang
    java.lang.NullPointerException: Attempt to invoke interface method 'java.util.Iterator java.util.Set.iterator()' on a null object reference
  3. 0

    Null Mastery object in MasteryPage

    GitHub | 2 years ago | prefanatic
    java.lang.NullPointerException: Attempt to invoke interface method 'java.util.Iterator java.util.List.iterator()' on a null object reference
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  5. 0

    Null Mastery object in MasteryPage

    GitHub | 2 years ago | prefanatic
    java.lang.NullPointerException: Attempt to invoke interface method 'java.util.Iterator java.util.List.iterator()' on a null object reference
  6. 0

    java.lang.NullPointerException On multiple codes

    ezeenow.com | 8 months ago
    java.lang.RuntimeException: Unable to start activity ComponentInfo{project.app/project.app.activity.VideoDetailActivity}: android.view.InflateException: Binary XML file line #21: Error inflating class fragment

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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke interface method 'java.util.Iterator java.util.Set.iterator()' on a null object reference

      at com.geolore.flagquiz.MainActivityFragment.resetQuiz()
    2. com.geolore.flagquiz
      MainActivity.onStart
      1. com.geolore.flagquiz.MainActivityFragment.resetQuiz(MainActivityFragment.java:137)
      2. com.geolore.flagquiz.MainActivity.onStart(MainActivity.java:67)
      2 frames
    3. Android Platform
      ActivityThread.performLaunchActivity
      1. android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1259)
      2. android.app.Activity.performStart(Activity.java:6026)
      3. android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2302)
      3 frames