diff --git a/day11/src/com/inmind/final01/Demo04.java b/day11/src/com/inmind/final01/Demo04.java
new file mode 100644
index 0000000..6cb7782
--- /dev/null
+++ b/day11/src/com/inmind/final01/Demo04.java
@@ -0,0 +1,19 @@
+package com.inmind.final01;
+/*
+final关键字用于修饰成员变量
+成员变量：类中方法外
+ */
+public class Demo04 {
+    //成员变量
+    final int i = 1;
+    final int j;//可以通过构造方法，赋值
+
+    public Demo04(int j){
+        this.j = j;
+    }
+
+
+
+    public static void main(String[] args) {
+    }
+}