版权声明：欢迎转载 https://blog.csdn.net/weixin_33387378/article/details/87633005
LinkedList<Integer> linkedList = new LinkedList<>();
linkedList.add(1);
linkedList.add(2);
linkedList.add(3);
System.out.println(linkedList);
linkedList.add(4);
System.out.println(linkedList);
linkedList.pop();
System.out.println(linkedList);[1, 2, 3]
[1, 2, 3, 4]
[2, 3, 4]