10.33mouseeventdemo.java

来自「JAVA程序设计的源代码」· Java 代码 · 共 30 行

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class MouseEventDemo extends Applet implements MouseListener, MouseMotionListener
{
int x1,y1,x2,y2;
public void init(){
addMouseListener(this);    ///设置事件监听
addMouseMotionListener(this);
}
public void paint(Graphics g){
g.drawLine(x1,y1,x2,y2);    //在指定位置画直线
}

public void mousePressed(MouseEvent e){    //各种鼠标事件处理函数
x1=e.getX();
y1=e.getY();
}
public void mouseClicked(MouseEvent e){}    
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseReleased(MouseEvent e){}
public void mouseDragged(MouseEvent e){
x2=e.getX();
y2=e.getY() ;
repaint ();
}
public void mouseMoved(MouseEvent e) {}
}