// Create some buttons
JButton ok = new JButton("OK");
JButton cancel = new JButton("Cancel");
JPanel buttonPanel = new JPanel();
buttonPanel.add(ok);
buttonPanel.add(cancel);
JLabel msg = new JLabel("Is this OK?", JLabel.CENTER);
// Create a frame, get its root pane, and set the OK button as the
// default. This button is pressed if we press the Enter key while the
// frame has focus.
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JRootPane root = f.getRootPane();
root.setDefaultButton(ok);
// Layout and Display
Container content = f.getContentPane();
content.setLayout(new BorderLayout());
content.add(msg, BorderLayout.CENTER);
content.add(buttonPanel, BorderLayout.SOUTH);
f.setSize(200,100);
f.setVisible(true);
