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## 目录

 * [目录](#目录)
 * [面试](#面试)
     * [面试技巧](#面试技巧)
     * [Java 面试题](#Java面试题)
     * [Spring 面试题](#Spring面试题)
     * [Spring Boot 面试题](#SpringBoot面试题)
     * [Spring MVC 面试题](#SpringMVC面试题)
 * [Java](#java)
    * [教妹学Java](#教妹学Java)
 * [说明](#说明)

## 面试

### 面试技巧

- [面试技巧](docs/java/.md)

### Java面试题

- [300 道核心面试题（上）](docs/java/.md)
- [300 道核心面试题（下）](docs/java/.md)
- [字符串面试题](docs/java/.md)
- [多线程面试题](docs/java/.md)
- [集合面试题](docs/java/.md)

### Spring面试题

- [Spring 面试题](docs/java/.md)

### SpringBoot面试题

- [Spring Boot 面试题](docs/java/.md)

### SpringMVC面试题

- [Spring MVC 面试题](docs/java/.md)



## Java

### 教妹学Java

**基础知识：**

- [什么是 Java](docs/java/.md)
- [Java 历史](docs/java/.md)
- [Java 特性](docs/java/.md)
- [C++ 和 Java](docs/java/.md)
- [第一个 Java 程序](docs/java/.md)
- [Java 程序是如何运行的](docs/java/.md)
- [JDK,JRE,JVM](docs/java/.md)
- [Java 虚拟机详解](docs/java/.md)
- [Java 变量](docs/java/.md)
- [Java 数据类型](docs/java/.md)
- [Unicode 字符集](docs/java/.md)
- [操作符](docs/java/.md)
- [Java 的那些关键字](docs/java/.md)
- [if-else](docs/java/.md)
- [switch](docs/java/.md)
- [for 循环](docs/java/.md)
- [while 循环](docs/java/.md)
- [do-while 循环](docs/java/.md)
- [break](docs/java/.md)
- [continue](docs/java/.md)
- [Java 注释](docs/java/.md)

**对象和类：**

- [什么是面向对象编程](docs/java/.md)
- [命名约定](docs/java/.md)
- [对象和类](docs/java/.md)
- [方法](docs/java/.md)
- [构造方法](docs/java/.md)
- [static 关键字](docs/java/.md)
- [this 关键字](docs/java/.md)
- [继承](docs/java/.md)
- [聚合](docs/java/.md)
- [方法重载](docs/java/.md)
- [方法重写](docs/java/.md)
- [返回类型协变](docs/java/.md)
- [super 关键字](docs/java/.md)
- [初始化代码块](docs/java/.md)
- [final 关键字](docs/java/.md)
- [多态](docs/java/.md)
- [动态绑定](docs/java/.md)
- [instanceof](docs/java/.md)
- [抽象类](docs/java/.md)
- [接口](docs/java/.md)
- [抽象类和接口的区别](docs/java/.md)
- [包](docs/java/.md)
- [访问权限修饰符](docs/java/.md)
- [封装](docs/java/.md)


**内部类：**

- [什么是内部类](docs/java/.md)
- [成员内部类](docs/java/.md)
- [匿名内部类](docs/java/.md)
- [本地内部类](docs/java/.md)
- [静态内部类](docs/java/.md)
- [嵌套内部类](docs/java/.md)


**数组：**

- [数组](docs/java/.md)

**对象和类的一些细节：**

- [Object 类](docs/java/.md)
- [对象克隆](docs/java/.md)
- [Math 类](docs/java/.md)
- [包装器类](docs/java/.md)
- [递归](docs/java/.md)
- [Java 是值传递还是引用传递](docs/java/.md)
- [strictfp 关键字](docs/java/.md)
- [文档工具](docs/java/.md)
- [命令行参数](docs/java/.md)
- [对象和类的区别](docs/java/.md)
- [方法重载和方法重写的区别](docs/java/.md)


**字符串：**

- [什么是字符串](docs/java/.md)
- [字符串是不可变的](docs/java/.md)
- [字符串比较](docs/java/.md)
- [字符串拼接](docs/java/.md)
- [字符串截取](docs/java/.md)
- [StringBuffer 类](docs/java/.md)
- [StringBuilder 类](docs/java/.md)
- [String 和 StringBuffer 的区别](docs/java/.md)
- [StringBuffer 和 StringBuilder 的区别](docs/java/.md)
- [自定义不可变类](docs/java/.md)
- [打印对象字符串](docs/java/.md)
- [StringTokenizer 类](docs/java/.md)



**集合：**

- [集合框架](docs/java/.md)
- [ArrayList](docs/java/.md)
- [LinkedList](docs/java/.md)
- [ArrayList 和 LinkedList 的区别](docs/java/.md)
- [List 接口](docs/java/.md)
- [HashSet](docs/java/.md)
- [LinkedHashSet](docs/java/.md)
- [TreeSet](docs/java/.md)
- [Queue](docs/java/.md)
- [Deque](docs/java/.md)
- [Map接口](docs/java/.md)
- [HashMap](docs/java/.md)
- [LinkedHashMap](docs/java/.md)
- [TreeMap](docs/java/.md)
- [Hashtable](docs/java/.md)
- [HashMap 和 Hashtable 的区别](docs/java/.md)
- [EnumSet](docs/java/.md)
- [EnumMap](docs/java/.md)
- [Collections 工具类](docs/java/.md)
- [集合排序](docs/java/.md)
- [Comparable 接口](docs/java/.md)
- [Comparator 接口](docs/java/.md)
- [Comparable 和 Comparator 的区别](docs/java/.md)
- [Properties 类](docs/java/.md)
- [ArrayList 和 Vector 的区别](docs/java/.md)
- [Vector](docs/java/.md)
- [Stack](docs/java/.md)


**异常控制：**

- [什么是异常控制](docs/java/.md)
- [try-catch](docs/java/.md)
- [多个 catch](docs/java/.md)
- [内嵌 try 块](docs/java/.md)
- [final 块](docs/java/.md)
- [throw 关键字](docs/java/.md)
- [异常堆栈](docs/java/.md)
- [throws 关键字](docs/java/.md)
- [throw 和 throws 的区别](docs/java/.md)
- [final、finally 和 finalize 的区别](docs/java/.md)
- [方法重写时的异常控制](docs/java/.md)
- [自定义异常](docs/java/.md)

**多线程：**

- [什么是多线程](docs/java/.md)
- [线程的生命周期](docs/java/.md)
- [创建一个线程](docs/java/.md)
- [线程调度](docs/java/.md)
- [线程休眠](docs/java/.md)
- [能启动两次线程吗？](docs/java/.md)
- [能调用 run 方法代替 start 吗？](docs/java/.md)
- [停止线程](docs/java/.md)
- [线程命名](docs/java/.md)
- [线程优先级](docs/java/.md)
- [守护线程](docs/java/.md)
- [线程池](docs/java/.md)
- [线程组](docs/java/.md)
- [虚拟机突然关闭后如何发送警报？](docs/java/.md)
- [为什么要使用同步？](docs/java/.md)
- [同步块](docs/java/.md)
- [静态同步方法](docs/java/.md)
- [死锁](docs/java/.md)
- [线程通信](docs/java/.md)
- [线程打断](docs/java/.md)
- [可重入监视器](docs/java/.md)

**序列化：**

- [序列化和反序列化](docs/java/.md)
- [transient 关键字](docs/java/.md)

**网络编程：**

- [网络编程的一些概念](docs/java/.md)
- [socket 编程](docs/java/.md)
- [URL 类](docs/java/.md)
- [URLConnection 类](docs/java/.md)
- [HttpURLConnection 类](docs/java/.md)
- [InetAddress 类](docs/java/.md)
- [DatagramSocket 类](docs/java/.md)

**反射：**

- [反射 API](docs/java/.md)
- [newInstance 方法](docs/java/.md)
- [javap](docs/java/.md)
- [自定义反编译类](docs/java/.md)
- [调用私有方法](docs/java/.md)

**IO：**

- [输入输出流](docs/java/.md)
- [FileOutputStream 类](docs/java/.md)
- [FileInputStream 类](docs/java/.md)
- [BufferedOutputStream 类](docs/java/.md)
- [BufferedInputStream 类](docs/java/.md)
- [SequenceInputStream 类](docs/java/.md)
- [ByteArrayOutputStream 类](docs/java/.md)
- [ByteArrayInputStream 类](docs/java/.md)
- [DataOutputStream 类](docs/java/.md)
- [DataInputStream 类](docs/java/.md)
- [FilterOutputStream 类](docs/java/.md)
- [FilterInputStream 类](docs/java/.md)
- [ObjectStream 类](docs/java/.md)
- [ObjectStreamField 类](docs/java/.md)
- [Console 类](docs/java/.md)
- [FilePermission 类](docs/java/.md)
- [Writer 类](docs/java/.md)
- [Reader 类](docs/java/.md)
- [FileWriter 类](docs/java/.md)
- [FileReader 类](docs/java/.md)
- [BufferedWriter 类](docs/java/.md)
- [BufferedReader 类](docs/java/.md)
- [CharArrayReader 类](docs/java/.md)
- [CharArrayWriter 类](docs/java/.md)
- [PrintStream 类](docs/java/.md)
- [PrintWriter 类](docs/java/.md)
- [OutputStreamWriter 类](docs/java/.md)
- [InputStreamReader 类](docs/java/.md)
- [PushbackInputStream 类](docs/java/.md)
- [PushbackReader 类](docs/java/.md)
- [StringWriter 类](docs/java/.md)
- [StringReader 类](docs/java/.md)
- [PipedWriter 类](docs/java/.md)
- [PipedReader 类](docs/java/.md)
- [FilterWriter 类](docs/java/.md)
- [FilterReader 类](docs/java/.md)
- [File 类](docs/java/.md)
- [FileDescriptor 类](docs/java/.md)
- [RandomAccessFile 类](docs/java/.md)
- [Scanner 类](docs/java/.md)


**日期和时间：**

- [日期和时间 API](docs/java/.md)
- [LocalDate 类](docs/java/.md)
- [LocalTime 类](docs/java/.md)
- [LocalDateTime 类](docs/java/.md)
- [MonthDay 类](docs/java/.md)
- [OffsetTime 类](docs/java/.md)
- [OffsetDateTime 类](docs/java/.md)
- [Clock 类](docs/java/.md)
- [ZoneDateTime 类](docs/java/.md)
- [ZoneId 类](docs/java/.md)
- [ZoneOffset 类](docs/java/.md)
- [Year 类](docs/java/.md)
- [YearMonth 类](docs/java/.md)
- [Period 类](docs/java/.md)
- [Duration 类](docs/java/.md)
- [Instant 类](docs/java/.md)
- [DayOfWeek 枚举](docs/java/.md)
- [Month 枚举](docs/java/.md)
- [java.util.Date 类](docs/java/.md)
- [java.sql.Date 类](docs/java/.md)
- [Calendar 类](docs/java/.md)
- [Duration 类](docs/java/.md)
- [TimeZone 类](docs/java/.md)
- [DateFormat](docs/java/.md)
- [SimpleDateFormat](docs/java/.md)
- [获取当前日期和时间](docs/java/.md)


**正则表达式：**

- [正则表达式](docs/java/.md)

**RMI**

- [远程方法调用](docs/java/.md)

**国际化**

- [国际化](docs/java/.md)

**Java 版本新特性：**

- [Java 4/5](docs/java/.md)
- [Java 7](docs/java/.md)
- [Java 8](docs/java/.md)
- [Java 9](docs/java/.md)
- [Java 15](docs/java/.md)

**字符串常用方法：**

- [charAt](docs/java/.md)
- [compareTo](docs/java/.md)
- [concat](docs/java/.md)
- [contains](docs/java/.md)
- [endsWith](docs/java/.md)
- [equals](docs/java/.md)
- [equalsIgnoreCase](docs/java/.md)
- [format](docs/java/.md)
- [getBytes](docs/java/.md)
- [getChars](docs/java/.md)
- [indexOf](docs/java/.md)
- [intern](docs/java/.md)
- [isEmpty](docs/java/.md)
- [join](docs/java/.md)
- [lastIndexOf](docs/java/.md)
- [length](docs/java/.md)
- [replace](docs/java/.md)
- [replaceAll](docs/java/.md)
- [split](docs/java/.md)
- [startsWith](docs/java/.md)
- [substring](docs/java/.md)
- [toCharArray](docs/java/.md)
- [toLowerCase](docs/java/.md)
- [toUpperCase](docs/java/.md)
- [trim](docs/java/.md)
- [valueOf](docs/java/.md)



## 说明

开源项目在于大家的参与，这才使得它的价值得到提升。感谢🙏有你！

### JavaPoint介绍

开源 JavaPoint 初始想法源于自己的个人那一段比较迷茫的学习经历。主要目的是为了通过这个开源平台来帮助一些在学习 Java 或者面试过程中遇到问题的小伙伴。

*  **对于 Java 初学者来说：** 本文档倾向于给你提供一个比较详细的学习路径，让你对于Java整体的知识体系有一个初步认识。另外，本文的一些文章
也是你学习和复习 Java 知识不错的实践；
*  **对于非 Java 初学者来说：** 本文档更适合回顾知识，准备面试，搞清面试应该把重心放在那些问题上。要搞清楚这个道理：提前知道那些面试常见，不是为了背下来应付面试，而是为了让你可以更有针对的学习重点。

Markdown 格式参考：[Github Markdown格式](https://guides.github.com/features/mastering-markdown/)，表情素材来自：[EMOJI CHEAT SHEET](https://www.webpagefx.com/tools/emoji-cheat-sheet/)。

Logo下的小图标是使用[Shields.IO](https://shields.io/) 生成的。

### 关于转载

如果你需要转载本仓库的一些文章到自己的博客的话，记得注明原文地址就可以了。

### 如何对该开源文档进行贡献

1. 笔记内容大多是手敲，所以难免会有笔误，你可以帮我找错别字。
2. 很多知识点我可能没有涉及到，所以你可以对其他知识点进行补充。
3. 现有的知识点难免存在不完善或者错误，所以你可以对已有知识点进行修改/补充。

> 如果要提 issue/question 的话，强烈推荐阅读 [《提问的智慧》](https://github.com/ryanhanwu/How-To-Ask-Questions-The-Smart-Way)、[《如何向开源社区提问题》](https://github.com/seajs/seajs/issues/545) 和 [《如何有效地报告 Bug》](http://www.chiark.greenend.org.uk/~sgtatham/bugs-cn.html)、[《如何向开源项目提交无法解答的问题》](https://zhuanlan.zhihu.com/p/25795393)。

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![个人微信](http://www.itwanger.com/assets/images/wangsan.png)

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《 Java 程序员进阶修炼手册》PDF 版本，在公众号 **[沉默王二](#公众号)** 后台回复“** Java**”即可获取。

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