ReentrantLock公平锁演示代码

package com.dq;

import java.util.concurrent.locks.ReentrantLock;

public class ThreadTest 
{
	// 用true初始化锁就得到公平锁
	private static ReentrantLock lock = new ReentrantLock(true);
	
	public static class T extends Thread 
	{
		public T(String name) {
			super(name);
		}

		@Override
		public void run() 
		{
			lock.lock();
			try
			{
				System.out.println(this.getName() + "得到了锁");
			}
			finally
			{
				lock.unlock();
			}	
		}
	}
	
	public static void main(String[] args) throws Exception
	{
		T t1 = new T("线程1");
		T t2 = new T("线程2");
		T t3 = new T("线程3");
		t1.start();
		t2.start();
		t3.start();
		t1.join();
		t2.join();
		t3.join();
	}

}

执行结果为
线程1得到了锁
线程2得到了锁
线程3得到了锁