Java多线程与并发库高级应用-工具类介绍

class Outputer {
        Lock lock = new ReentrantLock();
        public void output(String name) {
            int len = name.length();
            lock.lock();    
            try{
                for (int i = 0; i < len; i++) {
                    char c = name.charAt(i);
                    System.out.print(c);
                }
            }finally{
                lock.unlock();  //这里防止内部代码出现异常，即无论如何最后都会释放锁
            }
            lock.unlock();
            System.out.println();
        }
}