Java事件处理机制 - 事件监听器的四种实现方式

自身类作为事件监听器
外部类作为事件监听器
匿名内部类作为事件监听器
内部类作为事件监听器
自身类作为事件监听器:import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

/**
*Java事件处理机制:自身类作为事件监听器
*@author Winty(wintys@gmail.com)
*@version 2008-12-3
*/
class ThisClassEvent extends JFrame implements ActionListener{
JButton btn;

public ThisClassEvent(){
super("Java事件监听机制");
setLayout(new FlowLayout());
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

btn=new JButton("点击");
btn.addActionListener(this);
getContentPane().add(btn);

setBounds(200,200,300,160);
setVisible(true);
}

/**************************************/
public void actionPerformed (ActionEvent e){
Container c=getContentPane();
c.setBackground(Color.red);
}
/**************************************/

public static void main(String args[]){
new ThisClassEvent();
}
}

外部类作为事件监听器:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/**
*Java事件处理机制:外部类作为事件监听器
*@author Winty(wintys@gmail.com)
*@version 2008-12-3
*/
class OuterClassEvent extends JFrame{
JButton btn;

public OuterClassEvent(){
super("Java事件监听机制");
setLayout(new FlowLayout());
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

btn=new JButton("点击");
btn.addActionListener(new OuterClass(this));
getContentPane().add(btn);

setBounds(200,200,300,160);
setVisible(true);
}

public static void main(String args[]){
new OuterClassEvent();
}
}

/*外部类*********************************/
class OuterClass implements ActionListener{
OuterClassEvent oce;

public OuterClass(OuterClassEvent oce){
this.oce = oce;
}

public void actionPerformed(ActionEvent e){
Container c=oce.getContentPane();
c.setBackground(Color.red);
}
}
/**************************************/
匿名内部类作为事件监听器:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/**
*Java事件处理机制:匿名内部类作为事件监听器
*@author Winty(wintys@gmail.com)
*@version 2008-12-3
*/
class AnonymousEvent extends JFrame{
JButton btn;

public AnonymousEvent(){
super("Java事件监听机制");
setLayout(new FlowLayout());
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

btn=new JButton("点击");
/*匿名内部类******************************/
btn.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent e){
Container c=getContentPane();
c.setBackground(Color.red);
}
}
);
/***************************************/
getContentPane().add(btn);

setBounds(200,200,300,160);
setVisible(true);
}

public static void main(String args[]){
new AnonymousEvent();
}
}
内部类作为事件监听器:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/**
*Java事件处理机制:内部类作为事件监听器
*@author Winty(wintys@gmail.com)
*@version 2008-12-3
*/
class InnerClassEvent extends JFrame{
JButton btn;

public InnerClassEvent(){
super("Java事件监听机制");
setLayout(new FlowLayout());
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

btn=new JButton("点击");
btn.addActionListener(new InnerClass());
getContentPane().add(btn);

setBounds(200,200,300,160);
setVisible(true);
}

/*内部类*********************************/
class InnerClass implements ActionListener{
public void actionPerformed (ActionEvent e){
Container c=getContentPane();
c.setBackground(Color.red);
}
}
/**************************************/

public static void main(String args[]){
new InnerClassEvent();
}
}

(附件:源代码下载地址:http://download.csdn.net/source/834557)