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

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cannot add to layout: constraint must be a s tring
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cannot add to layout: constraint must be a string
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cannot add to layout: constraint must be a string
via java-forums.org by Unknown author, 1 year ago
cannot add to layout: constraint must be a string
java.lang.IllegalArgumentException: cannot add to layout: constraint must be a s tring
at java.awt.CardLayout.addLayoutComponent(CardLayout.java:190)
at java.awt.Container.addImpl(Container.java:664)
at java.awt.Container.add(Container.java:307)
at undefined.Trajectory.init(Trajectory.java:277)
at sun.applet.AppletPanel.run(AppletPanel.java:347)
at java.lang.Thread.run(Thread.java:536)

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