字节客户端

面向对象的特性

https://www.cnblogs.com/fzz9/p/8973315.html（封装性、继承性、多态性）

其中多态性的深入理解：https://blog.csdn.net/weixin_42022555/article/details/81407202?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-4.channel_param&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-4.channel_param

内部类和内部静态类的区别

https://blog.csdn.net/vcliy/article/details/85235363

https://www.cnblogs.com/GrimMjx/p/10105626.html

java虚拟机的垃圾回收

ArrayList<>()和LinkedList<>()的区别

https://blog.csdn.net/TTTZZZTTTZZZ/article/details/84916281

https://blog.csdn.net/qq_32679815/article/details/78907437?utm_medium=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.channel_param&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.channel_param

算法题：103. 二叉树的锯齿形层次遍历（已做  需要复习）