Java多线程集锦

版权声明： https://blog.csdn.net/InternetProgrammers/article/details/72921342

//多线程之同步（方法）重点：synchronized关键字
class Ticket1 implements Runnable {

    private int tickets = 10;

    @Override
    public void run() {
        while (true) {
            saleTicket();
            if (tickets <= 0) {
                break;
            }
        }
    }

    private synchronized void saleTicket() {
        if (tickets > 0) {
            try {
                Thread.sleep(10);
            } catch (InterruptedException ex) {
                Logger.getLogger(Ticket1.class.getName()).log(Level.SEVERE, null, ex);
            }
            System.out.println(Thread.currentThread().getName() + "---卖出的票" + tickets--);
        }
    }
}

public class Test3 {

    public static void main(String[] args) {
        Ticket1 ticket = new Ticket1();
        new Thread(ticket, "线程一").start();
        new Thread(ticket, "线程二").start();
        new Thread(ticket, "线程三").start();
        new Thread(ticket, "线程四").start();

    }
}
//多线程之同步（代码块）
class Ticket implements Runnable {

    private int tickets = 1000;
    Object lock = new Object();

    public void run() {
        while (true) {
            synchronized (lock) {
                try {
                    Thread.sleep(10);//经过的线程休眠10毫秒
                } catch (InterruptedException ex) {
                    Logger.getLogger(Ticket.class.getName()).log(Level.SEVERE, null, ex);
                }
                if (tickets > 0) {
                    System.out.println(Thread.currentThread().getName() + "--卖出的票" + tickets--);
                } else {
                    break;
                }
            }
        }
    }
}

public class Test2 {
    public static void main(String[] args) {
        Ticket ticket=new Ticket();
        new Thread(ticket,"线程一").start();
        new Thread(ticket,"线程二").start();
        new Thread(ticket,"线程三").start();
        new Thread(ticket,"线程四").start();
    }
}
//多线程之插队  重点：.join()方法
class Thread1 implements Runnable {

    @Override
    public void run() {
        for (int i = 1; i < 6; i++) {
            System.out.println(Thread.currentThread().getName() + "输入：" + i);
            try {
                Thread.sleep(500);//线程休眠500毫秒
            } catch (InterruptedException ex) {
                Logger.getLogger(Thread1.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }

}

public class Test4 {

    public static void main(String[] args) throws Exception {
        Thread t = new Thread(new Thread1(), "线程一");
        t.start();
        for (int i = 1; i < 6; i++) {
            System.out.println(Thread.currentThread().getName() + "输入：" + i);
            if (i == 2) {
                t.join();
            }
            Thread.sleep(500);
        }
    }
}