diff --git a/day11/src/com/inmind/final01/Demo02.java b/day11/src/com/inmind/final01/Demo02.java
new file mode 100644
index 0000000..ce1079f
--- /dev/null
+++ b/day11/src/com/inmind/final01/Demo02.java
@@ -0,0 +1,4 @@
+package com.inmind.final01;
+//final关键字用于修饰方法:该方法就不能被子类重写
+public class Demo02 {
+}
diff --git a/day11/src/com/inmind/final01/Fu.java b/day11/src/com/inmind/final01/Fu.java
index 48acd7e..e654bad 100644
--- a/day11/src/com/inmind/final01/Fu.java
+++ b/day11/src/com/inmind/final01/Fu.java
@@ -1,4 +1,9 @@
 package com.inmind.final01;
 
-public final class Fu {
+//public final class Fu {
+public class Fu {
+
+    public final void method(){//该方法就不能被子类重写
+        System.out.println("父类的method方法");
+    }
 }
diff --git a/day11/src/com/inmind/final01/Zi.java b/day11/src/com/inmind/final01/Zi.java
index c2b7b83..1b44e72 100644
--- a/day11/src/com/inmind/final01/Zi.java
+++ b/day11/src/com/inmind/final01/Zi.java
@@ -1,4 +1,5 @@
 package com.inmind.final01;
 
-public class Zi {
+public class Zi extends Fu{
+
 }