并发库锁

package com.test;

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

public class ThreadTest7
{

	/**
	 * @param args
	 */
	public static void main(String[] args)
	{
		final Outputer outputer = new Outputer();
		for (int i = 0; i < 3; i++)
		{
			final int temp = i;
			new Thread(){
				@Override
				public void run()
				{
					if(temp % 2 == 0){
						for (int j = 0; j < 20; j++)
						{
							outputer.output1("abcdefghigklmnopqrstuvwxyz");
						}
					}else{
						for (int j = 0; j < 20; j++)
						{
							outputer.output1("0123456789");
						}
					}
				}
			}.start();
		}

	}

	static class Outputer{

		Lock lock = new ReentrantLock();

		public void output1(String str){
			lock.lock();
			try{
				for (int i = 0; i < str.length(); i++)
				{
					System.out.print(str.charAt(i));
				}
				System.out.println();
			}finally{
				lock.unlock();
			}
		}

		public void output2(String str){
			lock.lock();
			try{
				for (int i = 0; i < str.length(); i++)
				{
					System.out.print(str.charAt(i));
				}
				System.out.println();
			}finally{
				lock.unlock();
			}
		}
	}

}