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via Coderanch by Jim Yingst, 1 year ago
This exception has no message.
java.lang.NullPointerException: 	at undefined.PageContainingJTextField.addFocusListener(	at javax.swing.JComponent.enableSerialization(	at javax.swing.JComponent.(	at javax.swing.JPanel.(	at javax.swing.JPanel.(	at undefined.PageContainingJTextField.(	at undefined.FocusPeeker.(	at undefined.Test.main(