Queue.java

package com.coding.basic;

public class Queue {
	private LinkedList elementData = new LinkedList();
	
	public void enQueue(Object o){		
		elementData.add(o);;
	}
	
	public Object deQueue() throws Exception{
		if(isEmpty())
		{
			throw new Exception("Queue deQueue error");
		}
		return elementData.removeFirst();
	}
	
	public boolean isEmpty(){
		return elementData.size()>0;
	}
	
	public int size(){
		return elementData.size();
	}
}