JAVA中线程池的简单使用

比如现在有10个线程，但每次只想运行3个线程，当这3个线程中的任何一个运行完后，第4个线程接着补上。这种情况可以使用线程池来解决，线程池用起来也相当的简单，不信，你看：

package com.demo;

import java.util.ArrayList;
import java.util.Collection;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThreadPool {    

    private int threadCount = 10;

    private int threadpoolCount = 3;

    public void threadPoolControl() {
        ThreadObject[] et = new ThreadObject[threadCount];
        ExecutorService service = Executors.newFixedThreadPool(threadpoolCount);
        Collection<ThreadObject> c = new ArrayList<ThreadObject>();
        for (int i = 0; i < threadCount; i++) {
            et[i] = new ThreadObject();
            c.add(et[i]);
        }
        try {
            service.invokeAll(c);
            service.shutdown();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}

再加上ThreadObject类，这个类主要是线程的具体实现方法：

package com.demo;

import java.util.concurrent.Callable;

public class ThreadObject implements Callable<Object>{		

	public Object call() throws Exception {
		//do something......
		return null;
	}

}