java多线程学习之ReentrantReadWriteLock(一)

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package learn.thread;import java.util.concurrent.locks.ReentrantReadWriteLock;/*ReentrantReadWriteLock,比ReentrantLock更强大的锁,读读共享,只有读读是异步,其他读写,写读,写写都是互斥 */public class Demo16 {    static ReentrantReadWriteLock lock = new ReentrantReadWriteLock();    static int count = 0;    public static void main(String[] args) {        Thread t1 = new Thread() {            @Override            public void run() {                lock.readLock().lock();                try {                    System.out.println("线程1准备读取");                    Thread.sleep(3000);                    System.out.println("线程1读取完成");                } catch (InterruptedException e) {                    e.printStackTrace();                }                lock.readLock().unlock();            }        };        Thread t2 = new Thread() {            @Override            public void run() {                lock.readLock().lock();                try {                    System.out.println("线程2准备读取");                    Thread.sleep(3000);                    System.out.println("线程2读取完成");                } catch (InterruptedException e) {                    e.printStackTrace();                }                lock.readLock().unlock();            }        };        t1.start();        t2.start();    }}// 线程2准备读取// 线程1准备读取// 线程1读取完成// 线程2读取完成

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