Thread-safe blocking queue -- LIKI

import java.util.LinkedList;

import java.util.List;

public class BlockingQueue {

 private List queue = new LinkedList();

 private int  limit = 10;

 public BlockingQueue(int limit){

   this.limit = limit;

 }

 public synchronized void enqueue(Object item)

 throws InterruptedException  {

   while(this.queue.size() == this.limit) {

     wait();

   }

   if(this.queue.size() == 0) {

     notifyAll();

   }

   this.queue.add(item);

 }

 public synchronized Object dequeue()

 throws InterruptedException{

   while(this.queue.size() == 0){

     wait();

   }

   if(this.queue.size() == this.limit){

     notifyAll();

   }

   return this.queue.remove(0);

 }

}