转：最精简的java 线程池与任务队列

import java.util.*;
 public class WorkQueue
 {
    private final int nThreads;//线程池的大小
    private final PoolWorker[] threads;//用数组实现线程池
    private final LinkedList queue;//任务队列
 
   public WorkQueue(int nThreads){
      this.nThreads = nThreads;
      queue = new LinkedList();
      threads = new PoolWorker[nThreads];
 
       for (int i=0; i<nThreads; i++) {
          threads[i] = new PoolWorker();
          threads[i].start();//启动所有工作线程
       }
   }
 
   public void execute(Runnable r) {//执行任务
     synchronized(queue) {
             queue.addLast(r);
             queue.notify();
     }
   }
 
   private class PoolWorker extends Thread {//工作线程类
         public void run() {
                Runnable r;
                while (true) {
                     synchronized(queue) {
                       while (queue.isEmpty()) {//如果任务队列中没有任务，等待
                         try{
                           queue.wait();
                         }catch (InterruptedException ignored){}
                       }   
                        r = (Runnable) queue.removeFirst();//有任务时，取出任务
                    }
                    try {
                        r.run();//执行任务
                    }catch (RuntimeException e) {
                       // You might want to log something here
                   }
               }
       }
    }
 
 
  public static void main(String args[]){
       WorkQueue wq=new WorkQueue(10);//10个工作线程
       Mytask r[]=new Mytask[20];//20个任务
   
       for(int i=0;i<20;i++){
            r[i]=new Mytask();
            wq.execute(r[i]);
       }      
  }
 }
 class Mytask implements Runnable{//任务接口
          public void run(){
               String name=Thread.currentThread().getName();
               try{
                   Thread.sleep(100);//模拟任务执行的时间
               }catch(InterruptedException e){}
               System.out.println(name+" executed OK");
          }
   }

 

转自：http://www.cnblogs.com/null7/archive/2012/09/20/2696108.html