【2021最新版】Java基础面试题总结（70道题含答案解析）

最近面试的小伙伴很多，对此我整理了一份Java面试题手册：基础知识、JavaOOP、Java集合/泛型面试题、Java异常面试题、Java中的IO与NIO面试题、Java反射、Java序列化、Java注解、多线程&并发、JVM、Mysql、Redis、Memcached、MongoDB、Spring、SpringBoot、SpringCloud、RabbitMQ、Dubbo、MyBatis、ZooKeeper、数据结构、算法、Elasticsearch、Kafka、微服务、Linux等等。
可以分享给大家学习。【持续更新中】

完整版Java面试题地址：【2021最新版】Java面试真题汇总

序号	内容	地址链接
1	【2021最新版】JavaOOP面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/115288673
2	【2021最新版】多线程&并发面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/115489616
3	【2021最新版】JVM面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/115489616
4	【2021最新版】Mysql面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/115561030
5	【2021最新版】Redis面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/115642129
6	【2021最新版】Memcached面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/115642129
7	【2021最新版】MongoDB面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/115642129
8	【2021最新版】Spring面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/115738909
9	【2021最新版】Spring Boot面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/115738909
10	【2021最新版】Spring Cloud面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/115738909
11	【2021最新版】RabbitMQ面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/115738909
12	【2021最新版】Dubbo面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/116237861
13	【2021最新版】MyBatis面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/116427170
14	【2021最新版】ZooKeeper面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/116458096
15	【2021最新版】数据结构面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/116461620
16	【2021最新版】算法面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/116461620
17	【2021最新版】Elasticsearch面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/116461620
18	【2021最新版】Kafka面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/116659584
19	【2021最新版】微服务面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/116659584
20	【2021最新版】Linux面试题总结	https://blog.youkuaiyun.com/m0_48795607/article/details/116798880

Java集合/泛型面试题

1、ArrayList和linkedList的区别

答： Array(数组）是基于索引(index)的数据结构，它使用索引在数组中搜索和读取数据是很快的。

Array获取数据的时间复杂度是O(1)，但是要删除数据却是开销很大，因为这需要重排数组中的所有数据，(因为删除数据以后，需要