龟兔赛跑案例
模拟龟兔赛跑
package com.xiancheng.demo;
// 龟兔赛跑的案例
public class Race implements Runnable {
// 胜利者
private static String winner;
public static void main(String[] args) {
Race race = new Race();
new Thread(race,"兔子").start();
new Thread(race,"乌龟").start();
}
@Override
public void run() {
for (int i = 0; i <= 100; i++) {
// 判断胜利者
if (gameOver(i)){
break;
}
System.out.println(Thread.currentThread().getName() + "跑了"+ i + "步");
// 模拟兔子睡觉
if (Thread.currentThread().getName().equals("兔子") && i>1 && i%50==0){
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
// 判断是否完成比赛
public boolean gameOver(int steps){
// 判断是否有胜利者
if (winner != null){ // 已经存在胜利者
return true;
}else if (steps>=100){
winner = Thread.currentThread().getName();
System.out.println("winner is " + winner);
return true;
}
return false;
}
}