线程池——有限无限队列测试

package com.bjsxt.height.concurrent018;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

public class UseThreadPoolExecutor2 implements Runnable{

	private static AtomicInteger count = new AtomicInteger(0);
	
	@Override
	public void run() {
		try {
			int temp = count.incrementAndGet();
			System.out.println("任务" + temp);
			Thread.sleep(2000);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}
	
	public static void main(String[] args) throws Exception{
		//System.out.println(Runtime.getRuntime().availableProcessors());
		BlockingQueue<Runnable> queue = 
				//new LinkedBlockingQueue<Runnable>();
				new ArrayBlockingQueue<Runnable>(15);
		//有界队列执行过程：20个线程，先执行五个（因为初始化了5个）然后判断队列放不放得下剩下的15个，如果放不下
		//15个，就再创建5个线程 （因为Max，之前创建了五个，所以还可以再创建五个所以是10），如果放得下，Max参数无效，每次还是执行
		//5个线程。那剩下的线程就只能放到队列里。	
		ExecutorService executor  = new ThreadPoolExecutor(
					5, 		//core
					10, 	//max
					120L, 	//2fenzhong
					TimeUnit.SECONDS,
					queue);
		
		for(int i = 0 ; i < 20; i++){
			executor.execute(new UseThreadPoolExecutor2());
		}
		Thread.sleep(1000);
		System.out.println("queue size:" + queue.size());		//10
		Thread.sleep(2000);
	}


}