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

Coderanch | tadi raja | 9 years ago
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Root Cause Analysis

  1. java.lang.IllegalArgumentException

    cannot add to layout: constraint must be a string

    at java.awt.CardLayout.addLayoutComponent()
  2. Java RT
    Container.add
    1. java.awt.CardLayout.addLayoutComponent(CardLayout.java:190)
    2. java.awt.Container.addImpl(Container.java:664)
    3. java.awt.Container.add(Container.java:307)
    3 frames
  3. Unknown
    PanelDemo1.actionPerformed
    1. PanelDemo1.actionPerformed(PanelDemo1.java:84)
    1 frame
  4. Java RT
    EventDispatchThread.run
    1. javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1786)
    2. javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1839)
    3. javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
    4. javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
    5. javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:245)
    6. java.awt.Component.processMouseEvent(Component.java:5100)
    7. java.awt.Component.processEvent(Component.java:4897)
    8. java.awt.Container.processEvent(Container.java:1569)
    9. java.awt.Component.dispatchEventImpl(Component.java:3615)
    10. java.awt.Container.dispatchEventImpl(Container.java:1627)
    11. java.awt.Component.dispatchEvent(Component.java:3477)
    12. java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3483)
    13. java.awt.LightweightDispatcher.processMouseEvent(Container.java:3198)
    14. java.awt.LightweightDispatcher.dispatchEvent(Container.java:3128)
    15. java.awt.Container.dispatchEventImpl(Container.java:1613)
    16. java.awt.Window.dispatchEventImpl(Window.java:1606)
    17. java.awt.Component.dispatchEvent(Component.java:3477)
    18. java.awt.EventQueue.dispatchEvent(EventQueue.java:456)
    19. java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
    20. java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
    21. java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
    22. java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
    23. java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
    23 frames