java.lang.NullPointerException

Coderanch | selman Fermitsjelli | 4 years ago
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    JRadioButton -> NullPointerException when added to JPanel / JButtonGroup

    Coderanch | 4 years ago | selman Fermitsjelli
    java.lang.NullPointerException

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at Opgave_1.<init>()
    2. Unknown
      Opgave_1.main
      1. Opgave_1.<init>(Opgave_1.java:42)
      2. Opgave_1.main(Opgave_1.java:25)
      2 frames