Setting the default button : JRootPane « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JRootPane

1. Dark border
2. pressing the Enter key to trigger button's event

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JRootPane;

public class SettingDefaultButtonJRootPane {
  public static void main(String args[]) {
    JFrame frame = new JFrame("DefaultButton");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JButton button4 = new JButton("AAA");
    frame.add(button4,"Center");
    frame.add(new JButton("BBB"),"South");
    JRootPane rootPane = frame.getRootPane();
    rootPane.setDefaultButton(button4);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}

14.84.JRootPane
	14.84.1.	JRootPane
	14.84.2.	Setting Window Decoration Style
	14.84.3.	Setting the default button
	14.84.4.	Interact directly with the JRootPane of a JFrame
	14.84.5.	Make a JFrame looks like a JDialog
	14.84.6.	Customizing JRootPane Look and Feel