Blocking Queue

public class BlockingQueue {

  private List queue = new LinkedList();
  private int  maxSize = 10;

  public BlockingQueue(int limit){
    this.maxSize = maxSize;
  }


  public synchronized void enqueue(Object item) throws InterruptedException  {
    while(this.queue.size() == this.maxSize) {
      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.maxSize){
      notifyAll();
    }

    return this.queue.remove(0);
  }

}