Queue.java

package org.xukai.common;

import java.util.NoSuchElementException;

public class Queue {

	private LinkedList elementData = new LinkedList();
	
	public void enQueue(Object o){
		elementData.add(o);
	}
	
	public Object deQueue(){
		if (isEmpty()) {
			throw new NoSuchElementException();
		}
		return elementData.removeFirst();
	}
	
	public boolean isEmpty(){
		return elementData.size() == 0;
	}
	
	public int size(){
		return elementData.size();
	}
}