// DefaultButtonExample.java
//
import javax.swing.*;
import java.awt.*;

// Example using defaultButton and JRootPane.setDefaultButton()
public class DefaultButtonExample {
  public static void main(String[] args) {

    // 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 will be "pressed" if we hit <ENTER> while the
    // frame has focus.
    JFrame f = new JFrame();
    f.addWindowListener(new BasicWindowMonitor());
    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);
  }
}