HiddenDefaultButtonTest.java 文件源码

private static void createGUI() {
    frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JButton button = new JButton("Default button");
    button.setDefaultCapable(true);
    button.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            ButtonClickCount++;
        }
    });

    frame.add(button);
    button.setVisible(false);

    frame.getRootPane().setDefaultButton(button);

    frame.setSize(200, 200);
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
}