Telephone.main() has thrown a NullPointerException

We found this prefix in 2 webpages.
MapChildren (2)Typical messages (1)TraceDetailed Map
  1. java.lang.NullPointerException
    1.   at java.awt.Container.addImpl()
    2.   at java.awt.Container.add()
    3.   at Telephone.<init>()
    4.   at Telephone.main()
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  1. basic telephone keypad

    First:16 years ago
    Last:2 years ago
    Author:Dirk Schreckmann
  2. The infamous java.lang.NullPointerException.

    First:10 years ago
    Last:9 months ago
    Author:843785
MessageNumber of crashes
<No message>2
  1. java.lang.NullPointerException
    1.   at java.awt.Container.addImpl()
    2.   at java.awt.Container.add()
    3.   at Telephone.<init>()
    4.   at Telephone.main()
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