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fengyang2015 · Sep 10, 2016 · 98c6de1 · 98c6de1
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diff --git a/README.md b/README.md
@@ -6,44 +6,6 @@
 
 ## 目录
 
-* **Java学习很简单**
- * [字符串和数组](simple-java/string-and-array)
- * [常用的方法](simple-java/common-methods)
- * [类和接口](simple-java/classes-and-interfaces)
- * [集合](simple-java/collections)
- * [范型](simple-java/generics)
- * [异常](simple-java/exceptions)
- * [并发](simple-java/concurrency)
- * [流 / 数据库](simple-java/io-and-database)
- * [编译器和JVM](simple-java/compiler-and-jvm)
- * [反射教程](simple-java/reflection-tutorial.md)
-
-* **热门话题**
- * [Java开发的10个错误]()
- * [使用数组的10个技巧]()
- * [字符串的10个问题]()
- * [正则表达式的10个问题]()
- * [异常的10个问题]()
- * [集合的10个问题]()
- * [Map的9个问题]()
- * [最广泛使用的Java库]()
- * [为高级开发者推荐的10本书]()
- * [10个高质量Java博客]()
- * [Java面试的算法Top10]()
- * [8张图理解Java]()
- * [最长使用的前100个Java类]()
-
-* **流行库／框架／工具**
- * [什么是框架?]()
- * [Sevlet容器和Tomcat是什么?]()
- * [什么是面向切面编程？]()
- * [库和框架]()
- * [Spring]()
- * [使用Spring开源框架]()
- * [如何操作CVS?]()
- * [为什么我们要进行测试?]()
- * [jar文件转换为exe]()
-
 * **开源组件实现**
  * [MVC框架实现篇](mvc/index.md)
  * [IOC容器实现篇](ioc/index.md)

diff --git a/simple-java/string-and-array/README.md b/simple-java/string-and-array/README.md
@@ -1 +1,10 @@
-# 字符串和数组
+# 字符串和数组
+
+1. [String的不可变是什么？](diagram-to-show-java-strings-immutability.md)
+2. [substring()如何工作？](the-substring-method-in-jdk-6-and-jdk-7.md)
+3. [为什么String是不可变的？]()
+4. [使用""和构造函数创建字符串]()
+5. [String是引用传递吗？]()
+6. [length 和 length()]()
+7. [如何检查数组是否有效包含一个值？]()
+8. []()
diff --git a/simple-java/string-and-array/diagram-to-show-java-strings-immutability.md b/simple-java/string-and-array/diagram-to-show-java-strings-immutability.md
diff --git a/simple-java/string-and-array/the-substring-method-in-jdk-6-and-jdk-7.md b/simple-java/string-and-array/the-substring-method-in-jdk-6-and-jdk-7.md