Queue.java

package rui.study.coding2017.coding.basic;

public class Queue {
    LinkedList linkedList=new LinkedList();

    public void enQueue(Object o){
        linkedList.add(o);
    }

    public Object deQueue(){
        return linkedList.removeFirst();
    }

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

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