JAVA之Lock简单认识

         上一篇博文JAVA之synchronized认识介绍了synchronzied，在JDK1.5之前，要想实现资源的互斥，只能使用synchronized，JDK1.5提供了Lock类，该类可替代synchronzied。本文只是简单认识Lock的使用，下面例子仍然是拿上一篇博文中的例子进行修改.

package thread;

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

public class LockTest {

	public static void main(String[] args) {
		final Output output = new Output();
		// 启动两个线程，都是用output对象中的output方法进行打印
		new Thread(new Runnable() {
			@Override
			public void run() {
				output.output("weijianfei");
			}
		}).start();

		new Thread(new Runnable() {
			@Override
			public void run() {
				output.output("dreambroken");
			}
		}).start();
	}
}

class Output {
	Lock lock = new ReentrantLock();

	public void output(String s) {
		lock.lock();
		try {
			for (int i = 0; i < s.length(); i++) {
				try {
					Thread.sleep(100);// 模拟处理一个字符需要100毫秒
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
				System.out.print(s.charAt(i));
			}
			System.out.println();
		} catch (Exception e) {

		} finally {
			lock.unlock();
		}
	}
}

  运行结果

weijianfei
dreambroken