diff --git a/day08/src/com/inmind/string01/Demo07.java b/day08/src/com/inmind/string01/Demo07.java
new file mode 100644
index 0000000..235add4
--- /dev/null
+++ b/day08/src/com/inmind/string01/Demo07.java
@@ -0,0 +1,25 @@
+package com.inmind.string01;
+/*
+常用类_String的分割方法_split
+public String[] split(String regex) ：将此字符串按照给定的regex（规则）拆分为字符串数组
+ */
+public class Demo07 {
+    public static void main(String[] args) {
+        //定义一个字符串
+        String str = "1,22,张三";
+        //按,切割，获取对应的属性值;   注意：按什么分割，该字符串就不会出现
+        String[] values = str.split(",");
+        System.out.println(values);
+        for (int i = 0; i < values.length; i++) {
+            System.out.println(values[i]);
+        }
+
+        //扩展：将字符串转为学生对象！！
+        String str1 = "2,21,李四";
+        String[] strings = str1.split(",");
+        Student s = new Student(Integer.parseInt(strings[0]), Integer.parseInt(strings[1]), strings[2]);
+        System.out.println(s.getId());
+        System.out.println(s.getAge());
+        System.out.println(s.getName());
+    }
+}
diff --git a/day08/src/com/inmind/string01/Test08.java b/day08/src/com/inmind/string01/Test08.java
new file mode 100644
index 0000000..28a3800
--- /dev/null
+++ b/day08/src/com/inmind/string01/Test08.java
@@ -0,0 +1,8 @@
+package com.inmind.string01;
+/*
+常用类_String的练习_拼接字符串
+定义一个方法，把数组{1,2,3}按照指定个格式拼接成一个字符串。格式参照如下：[值1#值2#值3]。
+
+ */
+public class Test08 {
+}
diff --git a/day08/src/com/inmind/string01/Test09.java b/day08/src/com/inmind/string01/Test09.java
new file mode 100644
index 0000000..3b2fb73
--- /dev/null
+++ b/day08/src/com/inmind/string01/Test09.java
@@ -0,0 +1,7 @@
+package com.inmind.string01;
+/*
+8.常用类_String的练习_统计字符个数
+键盘录入一个字符串，统计字符串中大小写字母及数字字符个数
+ */
+public class Test09 {
+}