Reprinted from: http://blog.csdn.net/wjq3714/archive/2009/06/20/4284280.aspx
Six ways to close the form in Java
1. Use the enableEvents and processWindowEvent of JFrame
//Frame1.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Frame1 extends JFrame {
public Frame1() {
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
this.setSize(new Dimension(400, 300));
this.setTitle("Frame1");
}
protected void processWindowEvent(WindowEvent e) {
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSING) {
System.exit(0);
}
}
}
2. Directly implement the WindowListener interface
//Frame1.java
import java.awt.*;
import java.awt.event.*;
public class Frame1 extends Frame implements WindowListener {
public Frame1() {
this.setSize(new Dimension(400, 300));
this.setTitle("Frame1");
this.addWindowListener(this);
}
public void windowClosing(WindowEvent windowEvent) {
System.exit(0);
}
public void windowOpened(WindowEvent windowEvent) {
}
public void windowClosed(WindowEvent windowEvent) {
}
public void windowIconified(WindowEvent windowEvent) {
}
public void windowDeiconified(WindowEvent windowEvent) {
}
public void windowActivated(WindowEvent windowEvent) {
}
public void windowDeactivated(WindowEvent windowEvent) {
}
}
3. Directly inherit the window adapter WindowAdapter
//Frame1.java
import java.awt.*;
import java.awt.event.*;
public class Frame1 extends WindowAdapter {
public Frame1() {
Frame f=new Frame();
f.setSize(new Dimension(400, 300));
f.setTitle("Frame1");
f.addWindowListener(this);
f.setVisible(true);
}
public static void main(String[] s){
new Frame1();
}
public void windowClosing(WindowEvent windowEvent) {
System.exit(0);
}
}
4. Indirectly inherit the form adapter WindowAdapter
//Frame1.java
import java.awt.*;
import java.awt.event.*;
public class Frame1 extends Frame {
public Frame1() {
this.setSize(new Dimension(400, 300));
this.setTitle("Frame1");
this.addWindowListener(new winAdapter());
this.setVisible(true);
}
public static void main(String[] s){
new Frame1();
}
}
class winAdapter extends WindowAdapter{
public void windowClosing(WindowEvent windowEvent) {
System.exit(0);
}
}
5. Indirectly implement the WindowListener interface
//Frame1.java
import java.awt.*;
import java.awt.event.*;
public class Frame1 extends Frame {
public Frame1() {
this.setSize(new Dimension(400, 300));
this.setTitle("Frame1");
this.addWindowListener(new winEventHandle());
this.setVisible(true);
}
public static void main(String[] s){
new Frame1();
}
}
class winEventHandle implements WindowListener {
public void windowClosing(WindowEvent windowEvent) {
System.exit(0);
}
public void windowOpened(WindowEvent windowEvent) {
}
public void windowClosed(WindowEvent windowEvent) {
}
public void windowIconified(WindowEvent windowEvent) {
}
public void windowDeiconified(WindowEvent windowEvent) {
}
public void windowActivated(WindowEvent windowEvent) {
}
public void windowDeactivated(WindowEvent windowEvent) {
}
}
6. Use Inner Class
//Frame1.java
import java.awt.*;
import java.awt.event.*;
public class Frame1{
public Frame1(){
Frame f=new Frame();
f.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
f.setSize(new Dimension(400, 300));
f.setVisible(true);
}
public static void main(String[] s){
new Frame1();
}
}