Java 多线程Lock接口-优快云博客

本文介绍了一个使用ReentrantLock实现线程安全的售票系统的Java示例。通过对比传统的synchronized关键字，该文展示了如何利用Lock接口及其ReentrantLock实现类来确保并发环境下资源操作的原子性和一致性。

 1 package demo08;
 2 
 3 import java.util.concurrent.locks.Lock;
 4 import java.util.concurrent.locks.ReentrantLock;
 5 
 6 //使用Lock接口替换同步代码块, 实现线程的安全性
 7 //实现类 ReentrantLock
 8 public class SaleThread implements Runnable {
 9     private int ticket = 10;    //10张票
10     private Lock lock = new ReentrantLock();
11     public void run() {
12         while (true) {
13             //获取锁
14             lock.lock();
15             //对票数判断
16             if (ticket > 0) {
17                 try {
18                     Thread.sleep(10);
19                 } catch (InterruptedException e) {
20                     System.out.println(e.getMessage());
21                 }
22                 System.out.println(Thread.currentThread().getName()+"出售第"+ticket--);
23             }
24             //释放锁
25             lock.unlock();
26         }
27     }
28 }

 1 package demo08;
 2 
 3 public class ThreadDemo {
 4     public static void main(String[] args) {
 5         SaleThread ticket = new SaleThread();
 6         //创建并开启四个线程
 7         new Thread(ticket).start();
 8         new Thread(ticket).start();
 9         new Thread(ticket).start();
10     }
11 }