diff --git a/day09/src/com/inmind/extends_vars02/Demo03.java b/day09/src/com/inmind/extends_vars02/Demo03.java
new file mode 100644
index 0000000..ed45bdc
--- /dev/null
+++ b/day09/src/com/inmind/extends_vars02/Demo03.java
@@ -0,0 +1,10 @@
+package com.inmind.extends_vars02;
+/*
+区分子类方法中重名的三种变量
+ */
+public class Demo03 {
+    public static void main(String[] args) {
+        Zi zi = new Zi();
+        zi.method();
+    }
+}
diff --git a/day09/src/com/inmind/extends_vars02/Fu.java b/day09/src/com/inmind/extends_vars02/Fu.java
index 3050765..afab199 100644
--- a/day09/src/com/inmind/extends_vars02/Fu.java
+++ b/day09/src/com/inmind/extends_vars02/Fu.java
@@ -1,7 +1,7 @@
 package com.inmind.extends_vars02;
 
 public class Fu {
-    int num = 10;
+    int num = 10;//成员变量
     int numFu = 20;
 
     public void methodFu(){
diff --git a/day09/src/com/inmind/extends_vars02/Zi.java b/day09/src/com/inmind/extends_vars02/Zi.java
index cac12ed..a5d6f15 100644
--- a/day09/src/com/inmind/extends_vars02/Zi.java
+++ b/day09/src/com/inmind/extends_vars02/Zi.java
@@ -1,7 +1,7 @@
 package com.inmind.extends_vars02;
 
 public class Zi extends Fu{
-    int num = 30;
+    int num = 30;//成员变量
     int numZi = 40;
 
     public void methoZi(){
@@ -9,4 +9,13 @@ public class Zi extends Fu{
         System.out.println(numZi);
         System.out.println(numFu);
     }
+
+    public void method(){
+        int num = 50;//局部变量
+        System.out.println(num);//50 就近原则
+        System.out.println(this.num);//30
+        System.out.println(super.num);//super表示父类，父类的成员变量
+
+
+    }
 }