Semaphore(多资源多线程)

Semaphore

package Juc;

import java.util.Random;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;
/**
 * 多个共享资源，多个线程取抢占
 *  Semaphore
 *
 */
public class SemaphoreDemo {

	public static void main(String[] args) {

		Semaphore se =new Semaphore(3);//模拟3个车位
		
		for (int i = 1; i <=6; i++) { //6辆车
			new Thread(() -> {
				try {
					se.acquire();
					System.out.println(Thread.currentThread().getName()+"\t 抢到车位！");
					int s=(new Random().nextInt(10) + 1);
					try{TimeUnit.SECONDS.sleep(s);}catch (Exception e){e.printStackTrace();}
					System.out.println(Thread.currentThread().getName()+"\t 停车"+s+"s后离开！");
				} catch (Exception e) {
					e.printStackTrace();
				}finally {
					se.release();
				}
				
				
			},String.valueOf(i)).start();
		}
	}

}