计算机软件实验报告 课程名称：JAVA 程序设计 姓 名 李兆明 学 号 11 班 级 0820541 成 绩 设备名称及软件环境 MyEclipse 实验名称 Java Applet 技术 实验日期 2011-10-24 一．实验内容： 调试 P300 的例题 13.11 二．重点及难点 编写一个龟兔赛跑的多线程程序。 三．实现方法（含实现思路、程序流程图和源程序列表等） package com.java1018.struts; // 龟兔赛跑 public class Test extends JApplet implements Runnable { Image backpic, rabbit, tortoise; int x1 = 0, y1 = 0; int x2 = 0, y2 = 100; int rab_road = 0, tor_road = 0; int rab_time = 0, tor_time = 0; String str1 = "rabbit", str2 = "tortoise"; public void init() { setSize(700, 200); backpic = getImage(getCodeBase(), "back.gif"); rabbit = getImage(getCodeBase(), "rabbit.jpg"); tortoise = getImage(getCodeBase(), "tortoise.jpg"); } } public void paint(Graphics g) { g.drawImage(backpic, 0, 0, 700, 200, this); g.drawImage(rabbit, x1, y1, 60, 60, this); g.drawString(str1, x1, y1 + 80); g.drawImage(tortoise, x2, y2, 60, 60, this); g.drawString(str2, x2, y2 + 80); public void start() { Thread rab = new Thread(this, "rabbit"); Thread tor = new Thread(this, "tortoise"); rab.start(); tor.start();} 1 

public void run() { boolean stop = false; while (!stop) { try {Thread.sleep(100); } catch (InterruptedException ex) {} String threadName = Thread.currentThread().getName(); if (threadName.equals("rabbit")) { str1 = "rabbit"; x1 = x1 + 30; rab_time++; rab_road += 3; if (rab_road % 24 == 0) { str1 = "兔子睡眠"; try { Thread.sleep(2400); } catch (InterruptedException ex) {} rab_time += 24; } if (rab_road == 60) { stop = true; str1 = "兔子总共用时间(秒):" + rab_time; } } else if (threadName.equals("tortoise")) { x2 += 10; tor_road += 1; tor_time++; if (tor_road == 60) { stop = true; str2 = "乌龟总共用时间(秒):" + tor_time; repaint(); }} } } } 四．实验结果分析（含执行结果验证、输出显示信息、图形、调试过程中所遇的问题及处理方法等） 报告提交日期 2011-10-25 2 

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