import java.util.LinkedList;

public class LinkedListStackQueue {
    public static void main(String[] args) {
        LinkedListStackQueue linStackQueue=new LinkedListStackQueue();

        // 棧的測試
        linStackQueue.push(100);
        linStackQueue.push(200);
        linStackQueue.push(300);
        linStackQueue.push(400
 
);
        linStackQueue.pop();
        System.out.println(linStackQueue.peek()); // 300
        System.out.println(linStackQueue.isStackEmpty());  // false

        // 佇列的測試
        linStackQueue.put(100);
        linStackQueue.put(200);
        linStackQueue.put(300);
        linStackQueue.put(400);
        linStackQueue.get
 
();
        System.out.println(linStackQueue.get()); // 200
        System.out.println(linStackQueue.isQueueEmpty());  // false


    }
    private LinkedList linkList;  // 棧
    private LinkedList linkQueue;
    public LinkedListStackQueue() {
        // TODO Auto-generated constructor stub
        linkList= new
 
 LinkedList();
        linkQueue = new LinkedList();
    }
    public void push(Object o){ //壓棧
        linkList.addFirst(o);
    }
    public Object pop(){  // 出棧
        return linkList.removeFirst();
    }
    public Object peek(){  // 檢視棧頂元素
        return linkList.peek();
    }
    public boolean isStackEmpty(){ // 檢視是否為空

        return linkList.isEmpty();
    }

    public  void put(Object o){ // 入隊
        linkQueue.addLast(o);
    }
    public Object get (){ // 出隊
        return linkQueue.removeFirst();
    }
    public boolean isQueueEmpty(){ // 檢視是否為空

        return linkQueue.isEmpty();
    }


}