From 98c6de1fcc497186abe1b77f089f035426f48db5 Mon Sep 17 00:00:00 2001
From: biezhi <biezhi.me@gmail.com>
Date: Sat, 10 Sep 2016 16:10:34 +0800
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---
 README.md                                     | 38 -------------------
 simple-java/string-and-array/README.md        | 11 +++++-
 ...agram-to-show-java-strings-immutability.md |  0
 ...the-substring-method-in-jdk-6-and-jdk-7.md |  0
 4 files changed, 10 insertions(+), 39 deletions(-)
 create mode 100644 simple-java/string-and-array/diagram-to-show-java-strings-immutability.md
 create mode 100644 simple-java/string-and-array/the-substring-method-in-jdk-6-and-jdk-7.md

diff --git a/README.md b/README.md
index 98ae5fa..a8aae0d 100644
--- 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
index e9f91fa..7f8386c 100644
--- 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
\ No newline at end of file
+# 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. []()
\ No newline at end of file
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
new file mode 100644
index 0000000..e69de29
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
new file mode 100644
index 0000000..e69de29