使用LinkedList模拟栈Stack_Link

package demo.assemble;

import java.util.LinkedList;

class StackSimulation {
    private LinkedList link;//使用LinkedList模拟栈

    StackSimulation() {
        link = new LinkedList();
    }

    //尾部添加元素
    void add(Object o) {
        link.add(o);
    }

    //尾部删除元素
    Object removeLast() {
//        return link.removeLast();
        return link.pollLast();
    }

    //获取尾部元素
    Object getLast() {
//        return link.getLast();
        return link.peekLast();
    }

    //判断栈是否为空
    boolean isEmpty() {
        return link.isEmpty();
    }

    @Override
    public String toString() {
        return link.toString();
    }
}