笔记：Java实现三个线程A B C，BC线程执行完再执行A线

版权声明： https://blog.csdn.net/u012204535/article/details/83549236

final Lock lc = new ReentrantLock();

.. run() {
 lc.lock();
...
lc.unlock();
}
可能打开方式不对吧,没实现！

改用join() 可以实现(BC与A以单线程模式执行)，代码如下：

package com.w.thread;

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

public class Thread3 implements Runnable {

	final Lock lock = new ReentrantLock();

	private String name;

	public Thread3(String name) {
		super();
		this.name = name;
	}

	@Override
	public void run() {
		for (int i = 1; i < 10001; i++) {
			System.out.println("线程" + name + ":" + i);
		}
	}

	public static void main(String[] args) {
		Thread3 t1 = new Thread3("A");
		Thread3 t2 = new Thread3("B");
		Thread3 t3 = new Thread3("C");

		Thread A = new Thread(t1);
		Thread B = new Thread(t2);
		Thread C = new Thread(t3);

		try {
			B.start();
			B.join();
			C.start();
			C.join();
			A.start();
			A.join();
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}
}

不要在生产环境中使用Thread.join()，和没用单线程差不多。