用LinkedList模拟栈数据结构的集合并测试

 1 /*
 2  *需求：请用LinkedList模拟栈数据结构的集合，并测试
 3  *创建一个类将Linked中的方法封装
 4  */
 5 public class Demo4_LinkedList {
 6     public static void main(String[] args) {
 7         Stack stack = new Stack();
 8         stack.in("a");
 9         stack.in("b");
10         stack.in("c");
11         stack.in("d");
12         while (!stack.isEmpty()) {
13             System.out.println(stack.out());
14         }
15     }
16 }

 1 import java.util.LinkedList;
 2 
 3 public class Stack {
 4     @SuppressWarnings("rawtypes")
 5     private LinkedList list = new LinkedList();
 6 
 7     @SuppressWarnings("unchecked")
 8     public void in(Object obj) {// 模拟进栈
 9         list.addLast(obj);
10     }
11 
12     public Object out() {// 模拟出栈
13         return list.removeLast();
14     }
15 
16     public boolean isEmpty() {// 判断是否为空
17         return list.isEmpty();
18     }