Java线程：新特征-锁（上）(3)

/**
* 信用卡的用户
*/
class User implements Runnable {
        private String name;                //用户名
        private MyCount myCount;        //所要操作的账户
        private int iocash;                 //操作的金额，当然有正负之分了
        private Lock myLock;                //执行操作所需的锁对象

        User(String name, MyCount myCount, int iocash, Lock myLock) {
                this.name = name;
                this.myCount = myCount;
                this.iocash = iocash;
                this.myLock = myLock;
        }

        public void run() {
                //获取锁
                myLock.lock();
                //执行现金业务
                System.out.println(name + "正在操作" + myCount + "账户，金额为" + iocash + "，当前金额为" + myCount.getCash());
                myCount.setCash(myCount.getCash() + iocash);
                System.out.println(name + "操作" + myCount + "账户成功，金额为" + iocash + "，当前金额为" + myCount.getCash());
                //释放锁，否则别的线程没有机会执行了
                myLock.unlock();
        }
}