急啊，求一段Java程序

import java.awt.Graphics;
import java.awt.Point;
import java.awt.Event;
import java.awt.Color;
public class dragmouse extends java.applet.Applet
{
Point CurrentPoint =new Point(0,0);//初始化点的坐标和输出信息
String CurrentMessage=" ";
public boolean mouseDrag(Event evt,int x,int y)//拖动鼠标事件处理
{
CurrentPoint.x=x;//获得当前鼠标位置
CurrentPoint.y=y;
CurrentMessage="you are painting on:("+x+","+y+")";//更新输出
repaint();
return true;

}
public boolean mouseMove(Event evt,int x,int y)//移动鼠标事件处理
{
CurrentMessage="you are moving on:("+x+","+y+")";
repaint(); //重画
return true;

}
public void update(Graphics g)
{
g.setColor(getBackground());//清除输出消息的区域
g.fillRect(0,0,200,20);
paint(g);
}
public void paint(Graphics g)
{
g.setCo