还请各位GG，劳神！！！

程序如下：

/*
 * 
 *Copyright (c) 2001- Arko Information Technology Co.Ltd  All Rights Reserved.
 * 
 *
 *@(#)PerformancePaint.java   Version:3.1
 *
 *
 *Programmer: Yingyi Xie
 *Date: 2001/07/19
 *
 *
 */


import java.util.*;
import java.net.*;
import java.applet.*; 
import java.awt.Graphics; 
import java.awt.image.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.geom.*;

/*
 *
 *显示Y坐标值面板类
 *
 *实现Y坐标动态变化显示
 *
 *
 */
public class PerformancePaint extends JApplet implements Runnable{
       
     
       
       String yValue=new String("");
       int i;
       
       int dataCutmark=0;//进入dataCut次数为2时标记
       double value1=0;
       double value2=0;
       
       Font font;
       Color color;
       JPerformYPanel Jperformypanel;
      
       //test
       Thread thisthread;
       double yMax;
       
       public void init(){
            Container contentPane=this.getContentPane();
            contentPane.setLayout(null);
            font=new Font("宋体", Font.PLAIN,12);
            color=new Color(0,0,0);
           
            yValue=new String("10&20&30&40&50");//y坐标的坐标值
            Jperformypanel=new JPerformYPanel(yValue,dataCutmark,value1,value2);
            Jperformypanel.setBounds(30,155,100,391);
            contentPane.add(Jperformypanel);
            
            //创建新线程
           thisthread=new Thread(this);
            
        }//end init()
       
       
        public void start(){  
              thisthread.start();
        }
   
   
      
       public void run(){
       
        for(i=0;i