Lock的使用

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * 演示Lock的使用
 */
public class UserLock {
    private static Lock lock = new ReentrantLock();
    private static void execute(){
        lock.lock(); // 获取锁
        try {
            System.out.println(Thread.currentThread().getName() + "得到了锁");
            System.out.println(Thread.currentThread().getName() + "is running."); // 模拟处理任务
        }finally{
            System.out.println(Thread.currentThread().getName() + "释放了锁");
            lock.unlock();  // 释放锁
        }
    }

    private static class UserThread extends Thread{
        public UserThread(String name){
            super(name);
        }
        @Override
        public void run() {
            execute();
        }
    }

    public static void main(String [] args) {
        for (int i=0; i < 5; i++){
            UserThread thread = new UserThread("第" + (i+1) + "个线程");
            thread.start();
        }
    }
}