package com.test; import java.util.Collection; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock; // LockTest1.java // 仓库 class Depot { private int size; // 仓库的实际数量 private Lock lock; // 独占锁 public Depot() { this.size = 0; this.lock = new ReentrantLock(); } public void produce(int val) { lock.lock(); try { size += val; System.out.printf("%s produce(%d) --> size=%d\n", Thread.currentThread().getName(), val, size); } finally { lock.unlock(); } } public void consume(int val) { lock.lock(); try { size -= val; System.out.printf("%s consume(%d) <-- size=%d\n", Thread.currentThread().getName(), val, size); } finally { lock.unlock(); } } }; // 生产者 class Producer { private Depot depot; public Producer(Depot depot) { this.depot = depot; } // 消费产品:新建一个线程向仓库中生产产品。 public void produce(final int val) { new Thread() { public void run() { depot.produce(val); } }.start(); } } // 消费者 class Customer { private Depot depot; public Customer(Depot depot) { this.depot = depot; } // 消费产品:新建一个线程从仓库中消费产品。 public void consume(final int val) { new Thread() { public void run() { depot.consume(val); } }.start(); } } public class LockTest1 { public static void main(String[] args) { Depot mDepot = new Depot(); Producer mPro = new Producer(mDepot); Customer mCus = new Customer(mDepot); //4个线程,2个线程操作produce方法,2个线程操作consume方法。4个线程使用同一个锁,每次只能由一个线程执行。 mPro.produce(60); mPro.produce(120); mCus.consume(90); mCus.consume(150); } }
多线程---ReentrantLock
猜你喜欢
转载自www.cnblogs.com/yaowen/p/9317674.html
今日推荐
周排行