[转]Java事件处理机制- 事件监听器的四种实现方式

原文来自/article/4290588.html

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:

Java代码



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:

Java代码



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:

Java代码



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:

Java代码



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();

}

}