多线程的基本使用

1.继承Thread类,重写run方法

package com.gang;

import java.util.*;

public class Harbor03  extends  Thread{
    @Override
    public void run() {
        for (int i = 0; i < 200; i++) {
            System.out.println("我在看代码");
        }
    }

    public static void main(String[] args) {
        Harbor03 harbor03 = new Harbor03();
        harbor03.start();
        for (int i = 0; i < 200; i++) {
            System.out.println("主线程");
        }

    }
}

2.实现runable接口,重写run方法

package com.gang;

import java.util.*;

public class Harbor03 implements Runnable{
    @Override
    public void run() {
        for (int i = 0; i < 200; i++) {
            System.out.println("我在看代码");
        }
    }

    public static void main(String[] args) {

        Harbor03 harbor03 = new Harbor03();
        new Thread(harbor03).start();

    }
}

3.龟兔赛跑代码

package com.gang;

import java.util.*;

public class Harbor03 implements Runnable{
    @Override
    public void run() {
        for (int i = 0; i < 200; i++) {
            if (Thread.currentThread().getName().equals("兔子")&& i%10==0){
                try {
                    Thread.sleep(0);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }

            boolean flag=gameOver(i);
            if (flag){
                break;
            }
            System.out.println(Thread.currentThread().getName()+"-->跑了"+i+"步数");
        }

    }
    private String winner;
    private boolean gameOver(int setps){
        if (winner !=null){
            return true;
        }
            if (setps==100){
                winner=Thread.currentThread().getName();
                System.out.println(winner+"冠军冠军");
                return true;
            }
        return false;
    }

    public static void main(String[] args) {

        Harbor03 harbor03 = new Harbor03();
        new Thread(harbor03,"兔子").start();
        new Thread(harbor03,"乌龟").start();

    }
}