java.lang.IllegalArgumentException: Component must be non-null

Coderanch | Ted Newholm | 5 years ago
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    InvalidClassException and serialization issues

    Stack Overflow | 2 years ago | user3764392
    java.lang.IllegalArgumentException: Component must be non-null at javax.swing.GroupLayout$ComponentSpring.<init>(GroupLayout.java:2953) at javax.swing.GroupLayout$ComponentSpring.<init>(GroupLayout.java:2933)

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    Root Cause Analysis

    1. java.lang.IllegalArgumentException

      Component must be non-null

      at javax.swing.GroupLayout$ComponentSpring.<init>()
    2. Java RT
      GroupLayout$ParallelGroup.addComponent
      1. javax.swing.GroupLayout$ComponentSpring.<init>(GroupLayout.java:2953)
      2. javax.swing.GroupLayout$ComponentSpring.<init>(GroupLayout.java:2933)
      3. javax.swing.GroupLayout$Group.addComponent(GroupLayout.java:1524)
      4. javax.swing.GroupLayout$ParallelGroup.addComponent(GroupLayout.java:2484)
      5. javax.swing.GroupLayout$ParallelGroup.addComponent(GroupLayout.java:2454)
      6. javax.swing.GroupLayout$Group.addComponent(GroupLayout.java:1505)
      7. javax.swing.GroupLayout$ParallelGroup.addComponent(GroupLayout.java:2476)
      7 frames
    3. Unknown
      GroupedLayout2x2.main
      1. GroupedLayout2x2.<init>(GroupedLayout2x2.java:32)
      2. GroupedLayout2x2.main(GroupedLayout2x2.java:61)
      2 frames