多线程02

package com.thread.demo01;

//创建线程方式2：实现runnable接口，重写run方法，执行线程需要丢入runnable接口实现类，调用start
public class TestThread3 implements  Runnable{
    @Override
    public void run() {
        //run方法线程体
        for (int i = 0; i < 20; i++) {
            System.out.println("我在看代码----"+i);
        }
    }

    public static void main(String[] args) {
        //主线程main线程

        //创建runnable接口的实现类对象
        TestThread3 testThread3 = new TestThread3();
        //创建线程对象，通过线程对象来开启我们的线程，代理
//        Thread thread = new Thread(testThread3);
//
//        thread.start();
        //上面两句可以合并为下面这句：
        new Thread(testThread3).start();

        for (int i = 0; i < 20; i++) {
            System.out.println("我在学习多线程---"+i);
        }
    }
}

买火车票：

 

package com.thread.demo01;

//多线程同时操作同一个对象

//买火车票的例子

//发现问题：多个线程操作同一个资源，线程不安全，数据紊乱
public class TestThread4 implements Runnable{

    //票数
    private  int ticketnums=10;

    @Override
    public void run() {
        while (true){
            if(ticketnums<=0){
                break;
            }
            //模拟延时
            try {
                Thread.sleep(200);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
            System.out.println(Thread.currentThread().getName()+"---->拿到了第"+ticketnums--+"票");

        }
    }

    public static void main(String[] args) {
        TestThread4 testThread4 = new TestThread4();
        new Thread(testThread4,"mao").start();
        new Thread(testThread4,"mi").start();
        new Thread(testThread4,"huanglao").start();
    }
}

龟兔赛跑：

package com.thread.demo01;

//模拟龟兔赛跑
public class Race implements Runnable{

    //胜利者
    private static String winner;
    @Override
    public void run() {
        for (int i = 0; i <= 100; i++) {

            //模拟兔子休息
            if(Thread.currentThread().getName().equals("兔子")&&i%10==0){
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }

            //判断比赛是否结束
            boolean flag=gameOver(i);
            //如果比赛结束就终止程序
            if(flag){
                break;
            }

            System.out.println(Thread.currentThread().getName()+"-->跑了"+i+"步");
        }
    }

        //判断是否完成比赛
    public boolean gameOver(int steps){
        if(winner!=null){
            return true;
        }{
            if(steps>=100){
                winner=Thread.currentThread().getName();
                System.out.println("胜利者是："+winner);
                return true;
            }
        }
        return false;
    }


    public static void main(String[] args) {
        Race race = new Race();
        new Thread(race,"兔子").start();
        new Thread(race,"乌龟").start();
    }


}