Java多线程的实现方式二

import java.util.concurrent.locks.ReentrantLock;

class Window implements Runnable{
    private int tic = 10;
    //实例化lock
    private ReentrantLock lock = new ReentrantLock();
    @Override
    public void run() {
        while (true){
            try {
                //调用lock锁定方法
                lock.lock();
                if (tic>0){
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(Thread.currentThread().getName()+":飘号"+":"+tic);
                    tic--;
                }else {
                    break;
                }
            }finally {
                //3.调用解锁方法
                lock.unlock();
            }

        }

    }
}
public class LookTest {
    public static void main(String[] args) {
        Window w = new Window();
        Thread t1= new Thread(w);
        Thread t2= new Thread(w);
        Thread t3= new Thread(w);
        t1.start();
        t2.start();
        t3.start();

    }
}



测试结果
Thread-0:飘号:10
Thread-0:飘号:9
Thread-0:飘号:8
Thread-0:飘号:7
Thread-1:飘号:6
Thread-1:飘号:5
Thread-1:飘号:4
Thread-1:飘号:3
Thread-2:飘号:2
Thread-2:飘号:1

Process finished with exit code 0

/**
 * 线程通信的例子
 * wait（）：一旦线程执行此方法进入阻塞状态，并且释放锁
 * notify(): 一旦执行此方法，就会和唤醒wait的线程，如果多个线程wait，就唤醒优先及高的线程
 * notifyAll():一旦执行此方法，就会唤醒所以被wait的线程
 *说明：1.wait()，notify(),notifyAll()三个方法必须使用在同步代码块，或同步方法中。
 * 2.wait(),notify(),notifyAll()三个方法的调用者必须是同步代码块或同步方法中的同步监视器;
 *   否则java.lang.IllegalMonitorStateException
 *
 */
class Number implements Runnable{
    private int number=1;
    private Object obj = new Object();

    @Override
    public void run() {
        while (true){
            synchronized (obj) {
                obj.notify();
                if (number<=10){
                    System.out.println(Thread.currentThread().getName()+":"+number);
                    number++;
                    try {
                        //使得调用此wait()方法的线程进入阻塞状态，并会释放锁
                        obj.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }else {
                    break;
                }
            }
        }
    }
}
public class CommunicationTest {
    public static void main(String[] args) {
        Number n1 = new Number();

        Thread thread1 = new Thread(n1);
        Thread thread2 = new Thread(n1);
        thread1.setName("线程1");
        thread2.setName("线程2");
        thread1.start();
        thread2.start();
      // System.out.println();
    }
}
测试结果
线程1:1
线程2:2
线程1:3
线程2:4
线程1:5
线程2:6
线程1:7
线程2:8
线程1:9
线程2:10

Process finished with exit code 0