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([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();


	}


} 

 

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);


	}


}


/**************************************/

 

 

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();


	}


} 

 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();
	}
} 

 

 

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