Queue.java

package com.coding.basic;

public class Queue {

	private LinkedList list = new LinkedList();

	public void enQueue(Object o) {
		list.addFirst(o);
	}

	public Object deQueue() {
		if (isEmpty()) {
			throw new IndexOutOfBoundsException();
		}
		Object object = list.removeLast();
		return object;
	}

	public boolean isEmpty() {
		return list.size() == 0;
	}

	public int size() {
		return list.size();
	}
}