java.lang.IllegalArgumentException: cannot add to lay out: constraint must be a string

Coderanch | Kajol Shroff | 2 decades ago
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Root Cause Analysis

  1. java.lang.IllegalArgumentException

    cannot add to lay out: constraint must be a string

    at java.awt.CardLayout.addLayoutComponent()
  2. Java RT
    Container.add
    1. java.awt.CardLayout.addLayoutComponent(Unknown Source)
    2. java.awt.Container.addImpl(Unknown Source)
    3. java.awt.Container.add(Unknown Source)
    3 frames
  3. Unknown
    GtraceStep1.main
    1. GtraceStep1.panelStep2of5(GtraceStep1.java:236)
    2. GtraceStep1.init(GtraceStep1.java:90)
    3. GtraceStep1.main(GtraceStep1.java:318)
    3 frames