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    java.lang.RuntimeException: Unable to resume activity {com.ourThesis.junieNegentien2015/com.ourThesis.junieNegentien2015.MainActivity}: java.lang.NullPointerException

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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at net.sf.robocode.repository.root.ClassPathRoot.visitDirectory()
    2. net.sf.robocode
      RobocodeMain.run
      1. net.sf.robocode.repository.root.ClassPathRoot.visitDirectory(ClassPathRoot.java:82)
      2. net.sf.robocode.repository.root.ClassPathRoot.update(ClassPathRoot.java:51)
      3. net.sf.robocode.repository.root.handlers.ClassPathHandler.visitDirectory(ClassPathHandler.java:36)
      4. net.sf.robocode.repository.root.handlers.RootHandler.visitDirectories(RootHandler.java:35)
      5. net.sf.robocode.repository.Database.update(Database.java:48)
      6. net.sf.robocode.repository.RepositoryManager.refresh(RepositoryManager.java:97)
      7. net.sf.robocode.repository.RepositoryManager.reload(RepositoryManager.java:121)
      8. net.sf.robocode.ui.WindowManager.showSplashScreen(WindowManager.java:353)
      9. net.sf.robocode.core.RobocodeMain.run(RobocodeMain.java:134)
      9 frames
    3. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:619)
      1 frame