去哪儿第三题01

 

练手，仿着写的

package test;

import java.util.LinkedList;

public class Qunaer031 {

    public int nThreads; //线程池中的线程数
    public PoolThreads []pool; //线程池
    public LinkedList<workTask> queue; //消息队列
    
    public Qunaer031(int nThreads) {
        super();
        this.nThreads = nThreads;
        queue = new LinkedList<workTask>();
        pool = new PoolThreads[nThreads];
        
        for(int i=0;i<nThreads;i++){
            pool[i] = new PoolThreads();
            pool[i].start();
        }
    }
    
    private void excute(Runnable r) {
        // TODO Auto-generated method stub
        synchronized (queue) {
            queue.addLast((workTask) r);
            queue.notify();
        }
    }
    
    private class PoolThreads extends Thread{

        @Override
        public void run() {
            // TODO Auto-generated method stub
            super.run();
            
            Runnable r;
            while(true){
                synchronized (queue) {
                    while(queue.isEmpty()){
                        try {
                            queue.wait();
                        } catch (InterruptedException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                    }
                    
                    r = queue.removeFirst();
                }
                try {
                    r.run();
                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }
    
    public static void main(String[] args) {
        Qunaer031 q = new Qunaer031(10);
        workTask task[] = new workTask[20];
        
        for(int i=0;i<20;i++){
            task[i] = new workTask();
            q.excute(task[i]);
        }
    }
    
}


class workTask implements Runnable{

    @Override
    public void run() {
        // TODO Auto-generated method stub
        String name = Thread.currentThread().getName();
        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        System.out.println(name+"执行成功");
    }
    
}