java 一个简单的线程池

来源：互联网发布：mac怎么下载炉石传说编辑：程序博客网时间：2024/06/07 12:33

本文给大家介绍一个简单的线程池的实现过程，方便大家对线程池的理解。

ThreadPool类如下：

public class ThreadPool{    static int MAX_THREAD = 1000;    static int MIN_THREAD = 14;    static int id = 1; //线程 ID 号,主要用于监视线程的工作情况    static private ThreadPool pool = new ThreadPool();    static public ThreadPool getThreadPool()    {        return pool;    }    Stack<WorkThread> stack = new Stack<WorkThread>();    private ThreadPool()    {    }    synchronized public boolean putWorkThread(WorkThread wt)    {        if (stack.size() < MIN_THREAD)        {            stack.push(wt);            return true;        }        else        {            return false;        }    }    synchronized public WorkThread getWorkThread()    {        WorkThread wt = null;        if (stack.isEmpty())        {            wt = new WorkThread(this);            new Thread(wt, "线程ID:" + id).start();            id++;        }        else        {            wt = stack.pop();        }        return wt;    }}

WorkThread类为工作线程，代码如下：

public class WorkThread implements Runnable{    Object lock = new Object();    Runnable runner = null;    ThreadPool pool = null;    public WorkThread(ThreadPool pool)    {        this.pool = pool;    }    public void start(Runnable r)    {        runner = r;        synchronized (lock)        {            lock.notify();        }    }    public void run()    {        while (true)        {            if (runner != null)            {                runner.run();                runner = null; //及时回收资源            }            if (pool.putWorkThread(this))            {                System.out.println(Thread.currentThread().getName() + " 被回收!");                synchronized (lock)                {                    try                    {                        lock.wait();                    }                    catch (InterruptedException ie)                    {                        System.out.println("停止线程时出现异常");                    }                }            }            else            {                System.out.println(Thread.currentThread().getName() + " 被丢弃!");                break;            }        }    }}

转载自：http://www.strutshome.com/index.php/archives/710

0 0