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Hi All, I am trying to get a GUI with 2 TextArea's, one above the other. It compiles fine, but I am getting this error when i run it: java.lang.IllegalArgumentException: adding a window to a container at java.awt.Container.addImpl(Container.java:336) at javax.swing.JLayeredPane.addImpl (JLayeredPane.java:201) at java.awt.Container.add(Container.java:267) at javax.swing.JRootPane.setContentPane (JRootPane.java:358) at javax.swing.JFrame.setContentPane (JFrame.java:550) at StreamGUI.main(StreamGUI.java:52)
It's the line where you say: frame.setContentPane( new StreamGUI() ); Your StreamGUI class is a frame itself, so you should use it as a one. You don't need to call setContentPane() because the content's were already set in it's constructor. As for the error, it's because you're trying to add a JFrame to a JFrame, you can only add a Container as the contents of a JFrame. Jeff [ April 14, 2002: Message edited by: Jeff Smith ]