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43 lines (33 loc) · 951 Bytes
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package com.brianway.learning.java.multithread.lock.example5;
/**
* Created by Brian on 2016/4/15.
*/
/**
* P220
* 测试方法int getQueueLength()
* 返回正在等待获取此锁定的线程估计数
*/
public class Run5_getQueueLength {
public static void main(String[] args) throws InterruptedException {
final Service2 service = new Service2();
Runnable runnable = new Runnable() {
public void run() {
service.serviceMethod1();
}
};
Thread[] threads = new Thread[10];
for (int i = 0; i < 10; i++) {
threads[i] = new Thread(runnable);
}
for (int i = 0; i < 10; i++) {
threads[i].start();
}
Thread.sleep(2000);
System.out.println("有线程数：" + service.lock.getQueueLength() + "在等待获取锁");
}
}
/*
输出：
ThreadName=Thread-0
有线程数：9在等待获取锁
*/