Java开发网 - 编写才能不必再写所不关心的事件

Topic: 编写才能不必再写所不关心的事件

1.编写才能不必再写所不关心的事件

Posted by: LLL_QQQ
Posted on: 2004-09-14 17:29

非常感谢^_^!
<1>是不是事件适配器只能继承,而不能通过接口来实现呢?
<2>怎样编写才能不必再写所不关心的事件:如本例<见下面>的
public void mousePressed(MouseEvent e) {}
public void mouseReleased(MouseEvent e){}
public void mouseClicked(MouseEvent e){}(假如我不关心这个事件);
附:

import java.awt.*;
import java.awt.event.*;

public class SSS extends MouseMotionAdapter implements MouseListener
{
  private Frame f;
  private TextField tf;
  public static void main(String args[]){
    SSS two=new SSS();
    two.go();
  }


  public void go(){
    f=new Frame("Two listener example");
    f.add(new Label("Click and drag the mouse"),"North");
    tf=new TextField(30);
    f.add(tf,"South");


    //注册监听程序
f.addMouseMotionListener(this);
    f.addMouseListener(this);
    f.setSize(300,300);
    f.setVisible(true);
  }

//实现MouseMotionListener接口中的方法

public void mouseDragged(MouseEvent e){
String s="鼠标拖动 Kisses

="+e.getX()+"Y="+e.getY();
tf.setText Moon

;
}
public void mouseEntered(MouseEvent e){

String s="鼠标进入";
tf.setText Moon

;
}
public void mouseExited(MouseEvent e){
String s="鼠标离开";
tf.setText Moon

;
}

public void mousePressed(MouseEvent e) {}
public void mouseReleased(MouseEvent e){}
public void mouseClicked(MouseEvent e){}

}