Java实现事件监听器的四种方式

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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();    }}