diff --git a/src/class/Person.kt b/src/class/Person.kt
index 89af67b..c669105 100644
--- a/src/class/Person.kt
+++ b/src/class/Person.kt
@@ -8,7 +8,7 @@ class Person {
     val type: String = "earthman"
     var age: Int = 20
     var sex: Int = 0
-    lateinit var name: String
+    var name: String
     init {
         this.sex = 1
         this.age = 23
diff --git a/src/class/Stu.kt b/src/class/Stu.kt
new file mode 100644
index 0000000..605fb59
--- /dev/null
+++ b/src/class/Stu.kt
@@ -0,0 +1,24 @@
+package `class`
+
+/**
+ * 类
+ *
+ */
+class Stu {
+    var name = "张三"
+    var age = 13
+
+    fun sayHello() {
+        println("name = $name,age = $age")
+    }
+}
+
+fun main(args: Array<String>) {
+    var stu = Stu()
+    stu.sayHello()
+
+    // 修改属性
+    stu.name = "朵儿"
+    stu.age = 14
+    stu.sayHello()
+}
\ No newline at end of file