Java中信号量Semaphore的简单使用

Java中信号量Semaphore的简单使用；

假设有3个人去银行办事，只有2个柜员，3人同时到达后须有一人等待，等待前两人办完之后再进行

import java.util.concurrent.Semaphore;

public class SemaphoreTest {

	public static void main(String[] args) {
		Semaphore semaphore = new Semaphore(2);
		
		Person pA = new Person(semaphore, "A");
		pA.start();
		Person pB = new Person(semaphore, "B");
		pB.start();
		Person pC = new Person(semaphore, "C");
		pC.start();
	}
	
}

class Person extends Thread {
	
	private Semaphore semaphore;
	
	public Person(Semaphore semaphore, String name) {
		setName(name);
		this.semaphore = semaphore;
	}
	
	public void run() {
		System.out.println(getName() + "正在等待");
		
		try {
			semaphore.acquire();
			System.out.println(getName() + "正在服务");
			sleep(10000);
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		semaphore.release();
		System.out.println(getName() + "完成服务");
	}
}