Java List集合深入学习 List: https://blog.csdn.net/qq_37939251/article/details/83499291 https://blog.csdn.net/weixin_40304387/article/details/80790177 Set: https://www.cnblogs.com/xinfang520/p/7684619.html Map: https://www.cnblogs.com/xiaostudy/p/9510763.html