java编写的一个缓存类cache，适用于生产者-消费者模式

/*
/------------------------
/ author: zhouhp
/   date: 2007-4-10
/  email: zhp_hlm@163.com
/    MSN: zhp_hlm@163.com
/-----------------------------------------------
/ This class is a queue cache in multithreading,
/ it store object at tail,and remove object at
/ head,and it is thread-safe.
/-------------------------------------
*/
package com.zhp.util;

import java.util.LinkedList;
import java.lang.InterruptedException;

public class Cache
{
    private LinkedList cache = new LinkedList();
    private int cacheSize = 10;

    public Cache()
    {
      
    }
   
    public Cache(int cacheSize)
    {
      this.cacheSize = cacheSize;   
    }
   
    public synchronized Object getCache() throws InterruptedException
    {
      System.out.println("Cache.getCache() method start!");
      Object object = null;
      while(true)
      {
        if(!cache.isEmpty())
        {
          object = cache.removeLast();
          notifyAll();
          break;
        }
        else
        {
          try
          {
            wait(); 
          }
          catch(InterruptedException e)
          {
            System.out.println("Cache.getCache() method is interrupted and end!");
            throw e;
          }
        }  
      }
      System.out.println("Cache.getCache() method end!");
      return object;    
    }

    public synchronized void setCache(Object object) throws InterruptedException
    {
      System.out.println("Cache.setCache() method start!");
      while(true)
      {
        if(cache.size() >= cacheSize)
        {
          try
          {
            wait(); 
          }
          catch(InterruptedException e)
          {
            System.out.println("Cache.setCache() method is interrupted and end!");
            throw e;
          } 
        }
        else
        {
          cache.addFirst(object);
          notifyAll();
          break;    
        }
      }
      System.out.println("Cache.setCache() method end!");
    }
   
    public String toString()
    {
      return cache.toString();
    }
}