_sidebar.md

**Java 概述**

- [什么是 Java](docs/overview/what-is-java.md)
- [Java 发展简史](docs/overview/java-history.md)
- [Java 的优势](docs/overview/java-advantage.md)
- [JDK 和 JRE 有什么区别](docs/overview/jdk-jre.md)
- [安装集成开发环境 Intellij IDEA](docs/overview/idea.md)
- [第一个 Java 程序：Hello World](docs/overview/hello-world.md)


**Java 基础语法**

- [基本数据类型](docs/basic-grammar/basic-data-type.md)
- [流程控制](docs/basic-grammar/flow-control.md)
- [运算符](docs/basic-grammar/operator.md)
- [注释：代码的最强辅助](docs/basic-grammar/javadoc.md)

**面向对象**

- [什么是对象？什么是类](docs/oo/object-class.md)
- [变量](docs/oo/var.md)
- [方法](docs/oo/method.md)
- [构造方法](docs/oo/construct.md)
- [代码初始化块](docs/oo/code-init.md)
- [抽象类](docs/oo/java-abstract.md)
- [接口](docs/oo/interface.md)
- [static 关键字](docs/oo/static.md)
- [this 和 super 关键字](docs/oo/this-super.md)
- [final 关键字](docs/oo/final.md)
- [instanceof 关键字](docs/oo/instanceof.md)


**字符串**

- [String 为什么是不可变的](docs/string/immutable.md)
- [字符串常量池](docs/string/constant-pool.md)
- [深入浅出 String.intern](docs/string/intern.md)
- [如何比较两个字符串是否相等](docs/string/equals.md)
- [如何拼接字符串](docs/string/join.md)
- [如何拆分字符串](docs/string/split.md)

**数组**

- [数组](docs/array/array.md)
- [打印数组](docs/array/print.md)

**集合框架**

- [初识集合框架](docs/collection/gailan.md)
- [时间复杂度](docs/collection/big-o.md)
- [ArrayList](docs/collection/arraylist.md)
- [LinkedList](docs/collection/linkedlist.md)
- [ArrayList 重拳出击，把 LinkedList 干翻在地](docs/collection/list-war-1.md)
- [被 ArrayList 锤了一拳后，LinkedList 很不服气](docs/collection/list-war-2.md)
- [海康威视一面：Iterator与Iterable有什么区别？](docs/collection/iterator-iterable.md)
- [为什么阿里巴巴强制不要在 foreach 里执行删除操作](docs/collection/fail-fast.md)
- [HashMap 的 hash 原理](docs/collection/hash.md)
- [HashMap 的扩容机制](docs/collection/hashmap-resize.md)
- [HashMap 的加载因子为什么是 0.75](docs/collection/hashmap-loadfactor.md)
- [为什么 HashMap 是线程不安全的？](docs/collection/hashmap-thread-nosafe.md)
- [HashMap 精选面试题（背诵版）](docs/collection/hashmap-interview.md)


**异常处理**

- [异常处理机制](docs/exception/gailan.md)
- [try-catch-finally](docs/exception/try-catch-finally.md)
- [throw 和 throws](docs/exception/throw-throws.md)
- [try-with-resouces](docs/exception/try-with-resouces.md)
- [异常最佳实践](docs/exception/shijian.md)

**常用工具类**

- [数组工具类：Arrays](docs/common-tool/arrays.md)
- [集合工具类：Collections](docs/common-tool/collections.md)

**加餐**

- [Java 中常用的 48 个关键字](docs/basic-extra-meal/48-keywords.md)
- [Java 命名约定](docs/basic-extra-meal/java-naming.md)
- [Java 默认的编码方式 Unicode](docs/basic-extra-meal/java-unicode.md)
- [new Integer(18) 与 Integer.valueOf(18) 有什么区别](docs/basic-extra-meal/int-cache.md)
- [自动拆箱与自动装箱](docs/basic-extra-meal/box.md)
- [方法重载和方法重写](docs/basic-extra-meal/override-overload.md)
- [Java 到底是值传递还是引用传递](docs/basic-extra-meal/pass-by-value.md)
- [浅拷贝与深拷贝](docs/basic-extra-meal/deep-copy.md)
- [为什么重写 equals 时必须重写 hashCode 方法](docs/basic-extra-meal/equals-hashcode.md)
- [注解](docs/basic-extra-meal/annotation.md)
- [枚举](docs/basic-extra-meal/enum.md)
- [深入理解 Java 中的反射](docs/basic-extra-meal/fanshe.md)
- [泛型](docs/basic-extra-meal/generic.md)
- [Java 不能实现真正泛型的原因是什么？](docs/basic-extra-meal/true-generic.md)
- [Java程序在编译期发生了什么](docs/basic-extra-meal/what-happen-when-javac.md)


**Java 虚拟机**

- [JVM 是什么？](docs/jvm/what-is-jvm.md)

-  **其他：**

- [公众号](docs/bottom.md)