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BoxLayout can't be shared
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BoxLayout can't be shared
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BoxLayout can't be shared
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java.awt.AWTError: BoxLayout can't be shared	at javax.swing.BoxLayout.checkContainer(BoxLayout.java:445)	at javax.swing.BoxLayout.invalidateLayout(BoxLayout.java:229)	at java.awt.Container.invalidate(Container.java:1444)	at java.awt.Component.addNotify(Component.java:6680)	at java.awt.Container.addNotify(Container.java:2567)	at javax.swing.JComponent.addNotify(JComponent.java:4685)	at java.awt.Container.addNotify(Container.java:2578)	at javax.swing.JComponent.addNotify(JComponent.java:4685)	at java.awt.Container.addNotify(Container.java:2578)	at javax.swing.JComponent.addNotify(JComponent.java:4685)	at javax.swing.JRootPane.addNotify(JRootPane.java:739)	at java.awt.Container.addNotify(Container.java:2578)	at java.awt.Window.addNotify(Window.java:663)	at java.awt.Frame.addNotify(Frame.java:470)	at java.awt.Window.pack(Window.java:704)	at boxlayoutdemo.BoxLayoutDemo.getGui(BoxLayoutDemo.java:59)	at boxlayoutdemo.BoxLayoutDemo.main(BoxLayoutDemo.java:74)