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多线程

时间：2022-12-02 22:58:34浏览次数：42  
标签：Thread thread void System new 多线程 public

  • 静态代理
  • 各种内部类
  • yield join后是继续执行 不是重新开始
  • sleep的性质 sleep不会释放锁？ wait会
  • 每个线程都有自己的工作内存 内存都是各自的 互不影响 是拷贝过去的？
  • 每个线程在自己的工作内存交互，内存控制不当会造成数据不一致
  • synchronized方法 释放锁后在哪里重新分配

线程创建

package com.thread.thread_create;
//线程创建方式一:继承Thread类，重写run()方法,调用start开启线程
//总结:注意,线程开启不一定立即执行,由CPU调度执行
public class ThreadCreateDemo01 extends Thread{
    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            System.out.println("子线程执行输出"+i);
        }
    }

    public static void main(String[] args) {
        Thread tcd = new ThreadCreateDemo01();
        tcd.start();

        for (int i = 0; i < 100; i++) {
            System.out.println("主线程执行输出"+i);
        }
    }
}

/*public class ThreadCreateDemo01 {


    public static void main(String[] args) {
        Thread tcd = new MyThread();
        tcd.start();

        for (int i = 0; i < 5; i++) {
            System.out.println("主线程执行输出"+i);
        }
    }
}

class MyThread extends Thread{
    @Override
    public void run() {
        for (int i = 0; i < 5; i++) {
            System.out.println("子线程执行输出"+i);
        }
    }
}*/

package com.thread.thread_create;
//案例 网图下载
import org.apache.commons.io.FileUtils;
import java.io.File;
import java.io.IOException;
import java.net.URL;
public class ThreadCreateTest02 extends Thread{
    private String url;
    private String pathname;
    public ThreadCreateTest02(String url,String pathname){
        this.url = url;
        this.pathname = pathname;
    }
    @Override
    public void run() {
        WebDownloader webDownloader = new WebDownloader();
        webDownloader.downloader(url,pathname);
        System.out.println("拷贝完成："+pathname);
    }

    public static void main(String[] args) {
        Thread t1 = new ThreadCreateTest02("/i/l/?n=22&i=blog/2836892/202211/2836892-20221118143133840-745717499.png"
                ,"basic grammar\\src\\com\\thread\\t1.png");
        Thread t2 = new ThreadCreateTest02("/i/l/?n=22&i=blog/2836892/202211/2836892-20221118143133840-745717499.png"
                ,"D:\\JavaProjects\\JavaSE\\basic grammar\\src\\com\\thread\\t2.png");
        Thread t3 = new ThreadCreateTest02("/i/l/?n=22&i=blog/2836892/202211/2836892-20221118143133840-745717499.png"
                ,"basic grammar\\src\\com\\thread\\t3.png");

        t1.start();
        t2.start();
        t3.start();//每次先后顺序不同
    }
}
class WebDownloader{
    public void downloader(String url,String pathname) {
        try {
            FileUtils.copyURLToFile(new URL(url),new File(pathname));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

package com.thread.thread_create;
//创建线程方式二 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方法。
public class ThreadCreateDemo03 implements Runnable{
    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            System.out.println("子线程执行输出"+i);
        }
    }

    public static void main(String[] args) {
        ThreadCreateDemo03 tcd = new ThreadCreateDemo03();
        new Thread(tcd).start();

        for (int i = 0; i < 20; i++) {
            System.out.println("主线程执行输出"+i);
        }
    }
}



/*public class ThreadCreateDemo03 {
    public static void main(String[] args) {
        MyRunnable mr = new MyRunnable();
        new Thread(mr).start();
        for (int i = 0; i < 20; i++) {
            System.out.println("主线程执行输出"+i);
        }
    }
}

class MyRunnable implements Runnable{
    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            System.out.println("子线程执行输出"+i);
        }
    }
}*/

package com.thread.thread_create;
//并发问题
//买火车票案例
//多个线程操作同一个资源的情况下,线程不安全,数据紊乱.

public class ThreadConcurrencyTest04 {
    public static void main(String[] args) {
        BuyTickets bt = new BuyTickets();
        new Thread(bt,"小明").start();
        new Thread(bt,"老师").start();
        new Thread(bt,"黄牛").start();
    }
}

class BuyTickets implements Runnable{
    private int ticketNums = 10;
    @Override
    public void run() {

        while(true){
            if (ticketNums <= 0){
                break;
            }

            try {
                Thread.sleep(200);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }

            System.out.println(Thread.currentThread().getName() + "抢到了第" + ticketNums-- + "张票");
        }

    }
}

package com.thread.thread_create;
//龟兔赛跑案例
public class Race05 {
    public static void main(String[] args) {
        Race r = new Race();
        new Thread(r,"rabbit").start();
        new Thread(r,"tortoise").start();
    }
}
class Race implements Runnable{
    private String winner;
    @Override
    public void run() {

        for (int i = 0; i <= 100; i++) {
            if (winner != null){
                break;
            }
            if (Thread.currentThread().getName() == "rabbit"){
                try {
                    Thread.sleep(1);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
            System.out.println(Thread.currentThread().getName() + "跑了" + i + "步");
            if (i >= 100 && winner == null){
                winner = Thread.currentThread().getName();
                System.out.println(winner + "赢了！");
            }
        }
    }

}

package com.thread.thread_create;
/*线程创建方式三:实现callable接口
callable的好处
1.可以定义返回值
2.可以抛出异常          */
import org.apache.commons.io.FileUtils;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.concurrent.*;
public class CallableDemo06 implements Callable<Boolean> {
    private String url;
    private String pathname;
    public CallableDemo06(String url, String pathname){
        this.url = url;
        this.pathname = pathname;
    }
    @Override
    public Boolean call() {
        WebDownloader webDownloader = new WebDownloader();
        webDownloader.downloader(url,pathname);
        System.out.println("拷贝完成："+pathname);
        return true;
    }

    public static void main(String[] args) throws ExecutionException, InterruptedException {
        CallableDemo06 cd1 = new CallableDemo06("/i/l/?n=22&i=blog/2836892/202211/2836892-20221118143133840-745717499.png"
                ,"basic grammar\\src\\com\\thread\\t1.png");
        CallableDemo06 cd2 = new CallableDemo06("/i/l/?n=22&i=blog/2836892/202211/2836892-20221118143133840-745717499.png"
                ,"basic grammar\\src\\com\\thread\\t2.png");
        CallableDemo06 cd3 = new CallableDemo06("/i/l/?n=22&i=blog/2836892/202211/2836892-20221118143133840-745717499.png"
                ,"basic grammar\\src\\com\\thread\\t3.png");

        ///创建执行服务:
        ExecutorService ser = Executors.newFixedThreadPool(3);

        //提交执行
        Future<Boolean> r1 = ser.submit(cd1);
        Future<Boolean> r2 = ser.submit(cd2);
        Future<Boolean> r3 = ser.submit(cd3);

        //获取结果
        boolean rs1 = r1.get();
        boolean rs2 = r2.get();
        boolean rs3 = r3.get();
        System.out.println(rs1);
        System.out.println(rs2);

        //关闭服务
        ser.shutdownNow();
    }
}
class WebDownloader2{
    public void downloader(String url,String pathname) {
        try {
            FileUtils.copyURLToFile(new URL(url),new File(pathname));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

package com.thread.thread_create;
//线程创建小结
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;

public class Summary07 {
    public static void main(String[] args) {
        new MyThread1().start();

        new Thread(new MyThread2()).start();

//        Callable<Integer> callable = new MyThread3();
//        FutureTask<Integer> futureTask = new FutureTask<>(callable);
        FutureTask<Integer> futureTask = new FutureTask<>(new MyThread3());
        new Thread(futureTask).start();
        try {
            Integer integer = futureTask.get();
            System.out.println(integer);
        } catch (InterruptedException | ExecutionException e) {
            throw new RuntimeException(e);
        }

    }
}
class MyThread1 extends Thread{
    @Override
    public void run() {
        System.out.println("MyThread-->1");
    }
}
class MyThread2 implements Runnable{
    @Override
    public void run(){
        System.out.println("MyThread-->2");
    }
}
class MyThread3 implements Callable<Integer>{
    @Override
    public Integer call(){
        System.out.println("MyThread-->3");
        return 100;
    }
}

静态代理

package com.thread.static_proxy;
//静态代理对比
public class StaticProxyTest01 {
    public static void main(String[] args) {
        /*new Thread(new Runnable() {
            @Override
            public void run() {
                System.out.println("子线程执行输出");
            }
        }).start();*/

        new Thread(() -> System.out.println("子线程执行输出") ).start();
        new WeddingCompany(new person()).happyMarry();
    }
}
interface Marry{
    void happyMarry();
}
class person implements Marry{
    @Override
    public void happyMarry() {
        System.out.println("XXX今天结婚了");
    }
}

class WeddingCompany implements Marry{
    private Marry target;

    public WeddingCompany() {
    }

    public WeddingCompany(Marry target) {
        this.target = target;
    }

    @Override
    public void happyMarry() {
        before();
        this.target.happyMarry();
        after();
    }

    private void after() {
        System.out.println("婚后工作");
    }

    private void before() {
        System.out.println("婚前准备");
    }
}

Lambda表达式补充

package com.thread.lambda_supplement;
//lambda 补充
public class LambdaSupplement01 {
    static class Like2 implements Like{
        @Override
        public void likeExpress() {
            System.out.println("i like2");
        }
    }
    class Like3 implements Like{
        @Override
        public void likeExpress() {
            System.out.println("i like3");
        }
    }

    public static void main(String[] args) {
        Like like = new Like1();
        like.likeExpress();

        like = new Like2();
        like.likeExpress();

        LambdaSupplement01 ls = new LambdaSupplement01();
        like = ls.new Like3();
        like.likeExpress();

        class Like4 implements Like{
            @Override
            public void likeExpress() {
                System.out.println("i like4");
            }
        }
        like = new Like4();
        like.likeExpress();


        like = new Like(){
            @Override
            public void likeExpress() {
                System.out.println("i like5");
            }
        };
        like.likeExpress();


        like = () -> System.out.println("i like6 lambda");
        like.likeExpress();


    }
}
interface Like{
    void likeExpress();
}
class Like1 implements Like{
    @Override
    public void likeExpress() {
        System.out.println("i like1");
    }
}

线程状态

package com.thread.thread_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 ThreadStopTest01 implements Runnable{
    //设置一个标志位
    private boolean flag = true;
    @Override
    public void run() {
        int i = 0;
        while(flag){
            System.out.println("run...Thread"+ i++);
        }
    }
    //设置一个公开的方法停止线程,转换标志位
    public void stop(){
        this.flag = false;
    }

    public static void main(String[] args) {
        ThreadStopTest01 tst = new ThreadStopTest01();
        new Thread(tst).start();
        for (int i = 0; i < 100; i++) {
            System.out.println("main"+i);
            if (i == 90){
                tst.stop();
                System.out.println("线程该停止了");
            }
        }
    }
}

package com.thread.thread_state;
//模拟网络延时 放大问题的发生性。
public class ThreadSleepTest02 {
    public static void main(String[] args) {
        BuyTickets bt = new BuyTickets();
        new Thread(bt,"小明").start();
        new Thread(bt,"老师").start();
        new Thread(bt,"黄牛").start();
    }
}

class BuyTickets implements Runnable {
    private int ticketNums = 10;

    @Override
    public void run() {
        while (true) {
            if (ticketNums <= 0) {
                break;
            }
            //模拟网络延时
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }

            System.out.println(Thread.currentThread().getName() + "抢到了第" + ticketNums-- + "张票");
        }
    }
}

package com.thread.thread_state;
//sleep两个例子
import java.text.SimpleDateFormat;
import java.util.Date;

public class ThreadSleepTest03 {
    public static void main(String[] args) {
        //打印系统当前时间
        Date date = new Date(System.currentTimeMillis());
        while(true){
            System.out.println(new SimpleDateFormat("HH:mm:ss").format(date));
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
            date = new Date(System.currentTimeMillis());
        }

//        tenDown();
    }
    //模拟倒计时
    public static void tenDown(){
        int num = 10;
        while(true){
            if (num == 0){
                break;
            }

            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

            System.out.println(num--);
        }
    }
}

package com.thread.thread_state;
//程序礼让
public class ThreadYieldDemo04 {
    public static void main(String[] args) {
        Runnable my = new MyYield();
        new Thread(my,"a").start();
        new Thread(my,"b").start();
    }
}
class MyYield implements Runnable{
    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName() + "程序开始执行");
        Thread.yield();
        System.out.println(Thread.currentThread().getName() + "程序结束执行");
    }
}

package com.thread.thread_state;
//线程强制执行 join
//Join合并线程，待此线程执行完成后，再执行其他线程，其他线程阻塞
public class ThreadJoinDemo05 implements Runnable{

    @Override
    public void run() {
        for (int i = 0; i < 80; i++) {
            System.out.println("此线程先完成执行" + i);
        }
    }

    public static void main(String[] args) throws InterruptedException {
        Runnable tjd = new ThreadJoinDemo05();
        Thread thread = new Thread(tjd);
        thread.start();

        for (int i = 0; i < 50; i++) {
            if (i == 20){
                thread.join();
            }
            System.out.println("主线程执行"+i);
        }
    }
}

package com.thread.thread_state;
//线程状态观测
public class ThreadStateDemo06 {
    public static void main(String[] args) throws InterruptedException {
        Thread thread = new Thread(() -> {
            for (int i = 0; i < 5; i++) {
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }

            System.out.println("-----------");
        });

        Thread.State state = thread.getState();
        System.out.println(state);//NEW

        thread.start();
        state = thread.getState();
        System.out.println(state);//RUNNABLE

        while(state != Thread.State.TERMINATED){
            Thread.sleep(100);
            state = thread.getState();
            System.out.println(state);
        }

    }
}

package com.thread.thread_state;
//线程优先级
//优先级低只是意味着获得调度的概率低,并不是优先级低就不会被调用了,这都是看CPU的调度
public class ThreadPriorityDemo07 {
    public static void main(String[] args) {
        System.out.println(Thread.currentThread().getName() + "-->"
                + Thread.currentThread().getPriority());

        Runnable mp = new MyPriority();
        Thread t1 = new Thread(mp);
        Thread t2 = new Thread(mp);
        Thread t3 = new Thread(mp);
        Thread t4 = new Thread(mp);
        Thread t5 = new Thread(mp);
        Thread t6 = new Thread(mp);

        t1.start();

        t2.setPriority(Thread.MIN_PRIORITY);
        t2.start();

        t3.setPriority(Thread.MAX_PRIORITY);
        t3.start();

        t4.setPriority(4);
        t4.start();

        t5.setPriority(6);
        t5.start();

        t6.setPriority(8);
        t6.start();

    }

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

package com.thread.thread_state;
//守护线程
public class DaemonDemo08 {
    public static void main(String[] args) {
        Runnable god = new God();
        Runnable person = new Person();

        Thread thread = new Thread(god);
        thread.setDaemon(true);
        thread.start();

        new Thread(person).start();

    }
}

class God implements Runnable{
    @Override
    public void run() {
        while(true){
            System.out.println("守护");
        }
    }
}

class Person implements Runnable{
    @Override
    public void run() {
        for (int i = 0; i < 36500; i++) {
            System.out.println("开心地活着");
        }
        System.out.println("=====goodbye,world======");
    }
}

线程同步

package com.thread.thread_synchronized;
//案例 ---> synchronized 解决
public class UnsafeTicketBuyingDemo01 {
    public static void main(String[] args) {
        Runnable bt = new BuyTickets();
        new Thread(bt,"小明").start();
        new Thread(bt,"老师").start();
        new Thread(bt,"黄牛").start();
    }
}
class BuyTickets implements Runnable{
    private int ticketNums = 10;
    private boolean flag = true;

    @Override
    public void run() {
        while (flag){

            //放大问题的发生性   对synchronized修饰后的情况进行放大
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }

            buy();
        }
    }
    //全是小明？在上面加了sleep ok了
    public synchronized void buy(){

        if (ticketNums <= 0){
            flag = false;
            return;
        }

        try {
            Thread.sleep(200);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }

        System.out.println(Thread.currentThread().getName() + "买到了第" + ticketNums-- + "张票");
    }
}

package com.thread.thread_synchronized;
//不安全的取钱案例---> synchronized 解决
public class UnsafeBankDemo02 {
    public static void main(String[] args) {
        Account account = new Account("结婚基金",100);
        Thread wm1 = new WithdrawMoney(account,50,"小明");
        Thread wm2 = new WithdrawMoney(account,100,"小红");
        wm1.start();
        wm2.start();
    }
}
class Account{
    String name;
    int balance;
    public Account(){

    }
    public Account(String name,int balance){
        this.name = name;
        this.balance = balance;
    }
}
class WithdrawMoney extends Thread{
    private Account account;
    private int withdrawMoney;
    private int nowMoney;

    public WithdrawMoney(Account account,int withdrawMoney,String name){
        super(name);
        this.account = account;
        this.withdrawMoney = withdrawMoney;

    }
    @Override
    public void run() {
        synchronized(account){

            if (account.balance - withdrawMoney < 0){
                System.out.println(Thread.currentThread().getName() + " 余额不足");
                return;
            }

            //放大问题的发生性
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }

            account.balance -= withdrawMoney;
            nowMoney += withdrawMoney;
            System.out.println(account.name+ "余额为：" + account.balance);
            System.out.println(this.getName()+ "手里的钱为：" + nowMoney);

        }
    }
}

package com.thread.thread_synchronized;
//线程不安全的集合 ArrayList---> synchronized 解决
import java.util.ArrayList;
import java.util.List;
public class UnsafeListDemo03 {
    public static void main(String[] args) {
        List<String> list = new ArrayList<>();
        for (int i = 0; i < 100; i++) {// 2000  or  10000

            //无论i是多少 加不加synchronized  都不会覆盖
//            new Thread(() -> {
//                synchronized (list) {
//                    list.add(Thread.currentThread().getName());
//                }
//            }
//            ).start();


            //数组会被覆盖 无论i是多少
//            new Thread( () -> {
//
//                    //放大问题的发生性  导致覆盖
//                    try {
//                        Thread.sleep(100);
//                    } catch (InterruptedException e) {
//                        throw new RuntimeException(e);
//                    }
//
//                    try {
//                        list.add(Thread.currentThread().getName());
//                    } catch (Exception e) {
//                        throw new RuntimeException(e);
//                    }
//
//            }
//            ).start();


            //在i=100时 ，这样就不会覆盖  主线程阻塞需要20s
            new Thread( () -> {

                synchronized (list){
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                    }

                    try {
                        list.add(Thread.currentThread().getName());
                    } catch (Exception e) {
                        throw new RuntimeException(e);
                    }
                }

            }
            ).start();


        }

        //主线程阻塞 等循环结束
        try {
            Thread.sleep(1000);//在放大了的情况下，i越大，就需要越多的等待时间；不放大就不需要太多
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }

        System.out.println(list.size());
    }
}

package com.thread.thread_synchronized;
//测试JUC安全类型的集合
import java.util.concurrent.CopyOnWriteArrayList;

public class JUCTest04 {
    public static void main(String[] args) throws InterruptedException {
        CopyOnWriteArrayList<String> list = new CopyOnWriteArrayList<>();
        for (int i = 0; i < 5000; i++) {
            new Thread(() -> list.add(Thread.currentThread().getName()) ).start();
        }
        Thread.sleep(3000);
        System.out.println(list.size());
    }
}

死锁

package com.thread.deadlock;
//死锁:多个线程互相抱着对方需要的资源，然后形成僵持.
public class DeadlockDemo01 {
    public static void main(String[] args) {
        Thread m1 = new Makeup(1,"灰姑娘");
        Thread m2 = new Makeup(2,"白雪公主");
        m1.start();
        m2.start();
    }
}
class Mirror{}
class Lipstick{}
class Makeup extends Thread{
    //需要的资源只有一份，用static来保证只有一份
    static Mirror mirror = new Mirror();
    static Lipstick lipstick = new Lipstick();
    private int choice;
    private String name;
    public Makeup(int choice,String name){
        this.choice = choice;
        this.name = name;
    }
    @Override
    public void run() {
        try {
            makeUp();
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
    }
    public void makeUp() throws InterruptedException {
        if (choice == 1){
            synchronized(mirror){
                System.out.println(this.name+"拿到了镜子");
                Thread.sleep(1000);

//                synchronized (lipstick){
//                    System.out.println(this.name+"拿到了口红");
//                }
            }
            synchronized (lipstick){
                System.out.println(this.name+"拿到了口红");
            }

        }else{
            synchronized(lipstick){
                System.out.println(this.name+"拿到了口红");
                Thread.sleep(1000);

//                synchronized (mirror){
//                    System.out.println(this.name+"拿到了镜子");
//                }
            }
            synchronized (mirror){
                System.out.println(this.name+"拿到了镜子");
            }
        }

    }
}

Lock锁

package com.thread.lock;
//测试Lock锁
import java.util.concurrent.locks.ReentrantLock;

public class LockDemo01 {
    public static void main(String[] args) {
        Runnable bt = new BuyTicket();
        new Thread(bt).start();
        new Thread(bt).start();
        new Thread(bt).start();
    }
}
class BuyTicket implements Runnable{
    private int ticketNums = 10;
    private final ReentrantLock lock = new ReentrantLock();
    @Override
    public void run() {
        while(true){

            //不然全是 0 拿票
            try {
                Thread.sleep(200);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }

            try{
                lock.lock();

                if (ticketNums>0){
                    try {
                        Thread.sleep(200);
                    } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                    }
                    System.out.println(Thread.currentThread().getName()+"-->"+ticketNums--);
                }else {
                    break;
                }

            }finally {
                lock.unlock();
            }

        }

    }
}

线程通信

package com.thread.thread_communication;
//线程通信   生产者与消费者模式  利用缓冲区解决  管程法
/*
通信的方法均是Object类的方法,都只能在同步方法或者同步代码块中使用,
否则会抛出异常IllegalMonitorStateException
 */
public class ProducerAndConsumer01 {
    public static void main(String[] args) {
        SynContainer sc = new SynContainer();
        Thread producer = new Producer(sc);
        Thread consumer = new Consumer(sc);
        producer.start();
        consumer.start();
    }
}
class Producer extends Thread{
    SynContainer synContainer;
    public Producer(SynContainer synContainer){
        this.synContainer = synContainer;
    }
    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            synContainer.push(new Chicken(i));
            System.out.println("生产者生产了第"+i+"只鸡");
        }
    }
}
class Consumer extends Thread{
    SynContainer synContainer;
    public Consumer(SynContainer synContainer){
        this.synContainer = synContainer;
    }
    @Override
    public void run() {
        for (int i = 0; i < 100; i++) {
            System.out.println("消费者消费了第"+synContainer.pop().id+"只鸡");
        }
    }
}
class Chicken{
    int id;
    public Chicken(int id){
        this.id = id;
    }
}
class SynContainer{
    private Chicken[] chickens = new Chicken[10];
    private int count;
    public synchronized void push(Chicken chicken){
        if (count == chickens.length){
            try {
                this.wait();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }

        chickens[count] = chicken;
        count++;
        this.notifyAll();
    }
    public synchronized Chicken pop(){
        if (count == 0){
            try {
                this.wait();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }

        count--;
        Chicken chicken = chickens[count];
        this.notifyAll();
        return chicken;
    }
}

package com.thread.thread_communication;
//生产者与消费者模式  信号灯法 标志位解决
public class ProducerAndConsumer02 {
    public static void main(String[] args) {
        TV tv = new TV();
        new Actor(tv).start();
        new Audience(tv).start();
    }
}
class Actor extends Thread{
    TV tv;
    public Actor(TV tv){
        this.tv = tv;
    }
    @Override
    public void run() {
        for (int i = 0; i <20 ; i++) {
            if (i%2 == 0){
                tv.perform("快乐大本营");
            }else {
                tv.perform("抖音广告");
            }
        }
    }
}
class Audience extends Thread{
    TV tv;
    public Audience(TV tv){
        this.tv = tv;
    }
    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            tv.watch();
        }

    }
}
class TV{
    private String show;
    private boolean flag = true;
    public synchronized void perform(String show){
        if (!flag){
            try {
                this.wait();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }
        this.show = show;
        System.out.println("表演了"+show);
        this.flag = !this.flag;
        this.notifyAll();
    }
    public synchronized void watch(){
        if (flag){
            try {
                this.wait();
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        }
        System.out.println("观众观看了"+show);
        this.flag = !this.flag;
        this.notifyAll();
    }
}

线程池

package com.thread.thread_pool;
//线程池
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class ThreadPoolDemo01 {
    public static void main(String[] args) {
        ExecutorService service = Executors.newFixedThreadPool(10);

        service.execute(new MyThread());
        service.execute(new MyThread());
        service.execute(new MyThread());
        service.execute(new MyThread());

        service.shutdown();
    }
}
class MyThread implements Runnable{
    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName());
    }
}

标签：Thread,thread,void,System,new,多线程,public
From： https://www.cnblogs.com/799rijiyuelei/p/16945899.html

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