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XXX should be declared abstract; it does not define windowOpened

q_yuan

发贴: 174
积分: 3

于 2004-11-04 10:15

高手帮我看一看这个程序！

{ 提问前请搜寻一下旧帖子
请尽量用准确的文字描述作为标题 }

import java.awt.*;
import java.awt.event.*;
public class TestAddListener implements ActionListener,WindowListener{
Frame f;
Button b;
public void create(){
f=new Frame("测试");
b=new Button("PRESS");
b.addActionListener(this);
f.addWindowListener(this);
f.add(b,"North");
f.setSize(200,200);
f.setVisible(true);
}
public static void main(String[] args){
TestAddListener ta = new TestAddListener();
ta.create();
}
public void actionPerformed(ActionEvent e){
System.out.println("the Button is pressed!");
}
public void windowActivated(WindowEvent e){};
public void windowClosed(WindowEvent e){};
public void windowCloseing(WindowEvent e){System.exit(1);};
public void windowDeactivated(WindowEvent e){};
public void windowDeiconfied(WindowEvent e){};
public void windowIconified(WindowEvent e){};
public void windowOpen(WindowEvent e){};
}

在编译这个程序时总是编不过去。提示为： TestAddListener should be declared abstract; it does not define windowOpened(java.awt.event.WindowEvent) in TestAddListener
这是个定义要怎么添加？谢谢！

why edited on 2004-11-04 10:30

• 25了才开始学JAVA晚吗？

话题树型展开

人气	标题	作者	字数	发贴时间
9239	XXX should be declared abstract; it does not define windowOpened	q_yuan	1220	2004-11-04 10:15
5324	Re:XXX should be declared abstract; it does not define windowOpened	why	61	2004-11-04 10:33
5949	Re:XXX should be declared abstract; it does not define windowOpened	q_yuan	8	2004-11-08 16:36

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