/** * Create the GUI and show it. For thread safety, this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() { // Make sure we have nice window decorations. JFrame.setDefaultLookAndFeelDecorated(true); // Create and set up the window. JFrame frame = new JFrame("SelectionDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Set up the content pane. SelectionDemo controller = new SelectionDemo(); controller.buildUI(frame.getContentPane()); // Display the window. frame.setSize(400, 400); frame.setLocationRelativeTo(null); frame.setVisible(true); }