Java事件处理的4种方法

 第一种 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([e-mail]) *@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();}}

 

 

第二种 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([e-mail]) *@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();}}

 

 

第三种 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([e-mail]) *@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();}}

 

 

第四种 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([e-mail]) *@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);}}/**************************************/