java.lang.NullPointerException

Stack Overflow | user6621670 | 7 months ago
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    Java - Why isnt CardLayout Working? Having bugs

    Stack Overflow | 7 months ago | user6621670
    java.lang.NullPointerException

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at JTableSortingPerson.<init>()
    2. Unknown
      AddressBook.main
      1. JTableSortingPerson.<init>(JTableSortingPerson.java:30)
      2. AddressBook.main(AddressBook.java:100)
      2 frames