java多线程学习笔记---线程状态4

Sleep休眠

//模拟网络延时，方法问题的发生性
public class TestSleep implements Runnable{
    //票总数
    private int ticketNum = 30;

    @Override
    public void run() {
        while(true){
            if (ticketNum<=0){
                break;
            }
            //模拟延时
            try {
                Thread.sleep(200);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            //获得当前的线程名称
            System.out.println(Thread.currentThread().getName()+"-->拿到了第"+ ticketNum-- + "张票");
        }
    }
    public static void main(String[] args) {
        TestThread4 ticket = new TestThread4();

        new Thread(ticket,"mlxg").start();
        new Thread(ticket,"zsmj").start();
        new Thread(ticket,"nmsl").start();
    }
}

import java.text.SimpleDateFormat;
import java.util.Date;

//模拟倒计时
public class TestSleep2 {

    public static void main(String[] args) {
        //打印当前时间
        Date nowtime = new Date(System.currentTimeMillis());
        while (true) {
            try {
                Thread.sleep(1000);
                //时间输出格式
                System.out.println(new SimpleDateFormat("HH:mm:ss").format(nowtime));
                //更新当前时间
                nowtime = new Date(System.currentTimeMillis());
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    //模拟倒计时
    public static void tenDown() throws InterruptedException {
        int num = 10;
        while (true){
            Thread.sleep(1000);
            System.out.println(num--);
            if (num<=0){

                System.out.println("新年快乐~~");
                break;
            }
        }
    }
}

Stop停止

package com.study.state;

/**
 * 测试stop
 * 1. 建议线程正常停止--利用次数，不建议死循环
 * 2. 建议使用标志位---设置一个标志位
 * 3.不要使用stop或者destroy等过时或者JDK不建议使用的方法
 */
public class TestStop implements Runnable{

    //1.设置一个标识位
    private boolean flag = true;

    @Override
    public void run() {
        int i = 0;
        while (flag){
            System.out.println("run...Thread" + i++);
        }
    }
    private void stop(){
        this.flag=false;
    }
    public static void main(String[] args) {
        TestStop testStop = new TestStop();

        new Thread(testStop).start();

        for (int i = 0; i < 1000; i++) {
            //System.out.println("main---" + i);
            if (i==900){
                //调用stop方法切换标志位，让线程停止
                testStop.stop();
                System.out.println("该线程该停止了");
            }
        }
    }
}

yield礼让

public class Testyield {
    public static void main(String[] args) {
        MyYield myYield = new MyYield();
        new Thread(myYield,"a").start();
        new Thread(myYield,"b").start();
    }
}

class MyYield implements Runnable{
    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName()+"线程开始");
        //礼让，礼让不一定成功
        Thread.yield();
        System.out.println(Thread.currentThread().getName()+"线程结束");
    }
}

Join加入

    public static void main(String[] args) {
        TestJoin testJoin = new TestJoin();
        Thread thread = new Thread(testJoin);
        thread.start();

        for (int i = 0; i < 1000; i++) {
            if (i==100){
                try {
                    thread.join();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            System.out.println("main" + i);
        }
    }

线程优先级

public class TestPriority {
    public static void main(String[] args) {
        //主线程默认优先级
        System.out.println(Thread.currentThread().getName() + "-->" + Thread.currentThread().getPriority());
        //
        MyPriority myPriority = new MyPriority();

        Thread t1 = new Thread(myPriority);
        Thread t2 = new Thread(myPriority);
        Thread t3 = new Thread(myPriority);
        Thread t4 = new Thread(myPriority);
        Thread t5 = new Thread(myPriority);

        //设置优先级，再启动
        t1.start();

        t2.setPriority(1);
        t2.start();

        t3.setPriority(4);
        t3.start();

        t4.setPriority(Thread.MAX_PRIORITY);
        t4.start();

        t5.setPriority(9);
        t5.start();
    }
}


class MyPriority implements Runnable{
    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName() + "-->" + Thread.currentThread().getPriority());
    }
}

守护线程

//测试的守护线程
public class testDemon {
    public static void main(String[] args) {
        God god = new God();
        You you = new You();
        //上帝守护线程
        Thread thread = new Thread(god);
        thread.setDaemon(true);
        thread.start();
        new Thread(you).start();
    }
}

class God implements Runnable{
    @Override
    public void run() {
        while (true){
            System.out.println("上帝照顾你");
        }
    }
}
class You implements Runnable{
    @Override
    public void run() {
        for (int i = 0; i < 36500; i++) {
            System.out.println("活着-->");
            if (i == 36499){
                System.out.println("你安详的去了");
                break;
            }
        }
    }
}