/**

*

*/

package code0905;

import java.util.concurrent.locks.Lock;

import java.util.concurrent.locks.ReentrantLock;

/**

* ReLock.java Copyright (c) 2016 ChongQing University All rights reserved.

*/

public class LockAccount {

double balance;// 账号余额

Lock lock = new ReentrantLock();// 创建锁对象

public LockAccount(double balance) {

super();

this.balance = balance;

}

// 使用显示锁

public void withdraw(double money) {

lock.lock();// 锁定

try {

if (balance >= 1000) {

try {

Thread.sleep(100);

balance -= 1000;

System.out.println("取款1000成功。");

} catch (Exception e) {

e.printStackTrace();

}

} else {

System.out.println("取款失败。");

}

} finally {

lock.unlock();// 释放锁

}

}

}