Queue.java

package week1_0226;

public class Queue {
	
	private LinkedList list = new LinkedList();
	public void enQueue(Object o){
		list.add(o);
	}
	
	public Object deQueue(){
		return list.removeFirst();
	}
	
	public boolean isEmpty(){
		return list.size() == 0;
	}
	
	public int size(){
		return list.size();
	}
}