B9 Concurrent 重入锁（ReentrantLock）

Posted 2022-02-22 zlxyt

【概述】

　　

【代码实例】

import java.util.concurrent.locks.ReentrantLock;

public class Main 

	public static void main(String[] args) 
		Command c = new Command();
		int nThreads = 5;
		for(int i = 0; i < nThreads; i++)
			new Thread(c).start();
		
	



class Command implements Runnable 
	
	ReentrantLock lock = new ReentrantLock();
	
	@Override
	public void run() 
		try
			lock.lock();
			System.out.println(Thread.currentThread().getName() + ": 获得锁！");
		catch(Exception e)
			//处理异常
		finally
			System.out.println(Thread.currentThread().getName() + ": 释放锁！");
			lock.unlock();
		
	

打印结果：

【lock() 方法处理流程】