Queue.java

package com.coding.weak1;

public class Queue {

	private ArrayList elementData = new ArrayList();

	public void enQueue(Object o){
		elementData.add(o);
	}
	
	public Object deQueue(){
		return elementData.remove(0);
	}
	
	public boolean isEmpty(){
		return elementData.size() == 0;
	}
	
	public int size(){
		return elementData.size();
	}
}