java.lang.NullPointerException

Stack Overflow | Praise Okwa | 2 days ago
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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at Manager.displayList()
    2. Unknown
      Vacation.main
      1. Manager.displayList(Manager.java:46)
      2. UserInterface.processMenu(UserInterface.java:42)
      3. UserInterface.start(UserInterface.java:85)
      4. Vacation.main(Vacation.java:6)
      4 frames