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java.lang.IllegalArgumentException: illegal component position at java.awt.Container.addImpl(Container.java:325) at java.awt.Container.add(Container.java:252) at javax.swing.JMenu.add(JMenu.java:511) at wordprocessor.WordProcessorDemo.<init>(WordProcessorDemo.java:68) at wordprocessor.WordProcessorDemo.main(WordProcessorDemo.java:18)