diff --git a/day09/src/com/inmind/extends03/Demo03.java b/day09/src/com/inmind/extends03/Demo03.java
new file mode 100644
index 0000000..6d1f823
--- /dev/null
+++ b/day09/src/com/inmind/extends03/Demo03.java
@@ -0,0 +1,15 @@
+package com.inmind.extends03;
+/*
+继承中成员方法的访问特点:在继承中访问成员方法时，new的是谁，就优先使用谁的成员方法，如果没有则向上找
+ */
+public class Demo03 {
+    public static void main(String[] args) {
+        Zi zi = new Zi();
+        Fu fu = new Fu();
+
+        fu.methodFu();
+
+        zi.methodZi();
+        zi.methodFu();
+    }
+}
diff --git a/day09/src/com/inmind/extends03/Fu.java b/day09/src/com/inmind/extends03/Fu.java
new file mode 100644
index 0000000..c7c7fb5
--- /dev/null
+++ b/day09/src/com/inmind/extends03/Fu.java
@@ -0,0 +1,7 @@
+package com.inmind.extends03;
+
+public class Fu {
+    public void methodFu() {
+        System.out.println("父类方法");
+    }
+}
diff --git a/day09/src/com/inmind/extends03/Zi.java b/day09/src/com/inmind/extends03/Zi.java
new file mode 100644
index 0000000..3d24d02
--- /dev/null
+++ b/day09/src/com/inmind/extends03/Zi.java
@@ -0,0 +1,7 @@
+package com.inmind.extends03;
+
+public class Zi extends Fu{
+    public void methodZi(){
+        System.out.println("子类方法");
+    }
+}