Java事件处理机制- 事件监听器的四种实现方式【转】

拼搏现实的明天。 2021-11-02 03:20 265阅读 0赞

原文：[http://stefan321.iteye.com/blog/345221][http_stefan321.iteye.com_blog_345221]

自身类作为监听器

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();
        }
    }

转载于:https://www.cnblogs.com/Leo-Forest/archive/2012/09/14/2685399.html

[http_stefan321.iteye.com_blog_345221]: http://stefan321.iteye.com/blog/345221