diff --git a/src/main/java/com/github/hcsp/inheritance/Animal.java b/src/main/java/com/github/hcsp/inheritance/Animal.java
new file mode 100644
index 0000000..b539503
--- /dev/null
+++ b/src/main/java/com/github/hcsp/inheritance/Animal.java
@@ -0,0 +1,11 @@
+package com.github.hcsp.inheritance;
+
+public class Animal {
+    String name;
+    public Animal(String name){
+        this.name = name;
+    }
+    public void sayMyName(){
+        System.out.println("我的名字是" + name);
+    }
+}
diff --git a/src/main/java/com/github/hcsp/inheritance/Cat.java b/src/main/java/com/github/hcsp/inheritance/Cat.java
index f86dc38..1f4cc87 100644
--- a/src/main/java/com/github/hcsp/inheritance/Cat.java
+++ b/src/main/java/com/github/hcsp/inheritance/Cat.java
@@ -1,12 +1,14 @@
 package com.github.hcsp.inheritance;
 
-public class Cat {
+public class Cat extends Animal{
     private String name;
 
     public Cat(String name) {
-        this.name = name;
+        super(name);
     }
 
+
+
     public void sayMyName() {
         System.out.println("我的名字是" + name);
     }
diff --git a/src/main/java/com/github/hcsp/inheritance/Dog.java b/src/main/java/com/github/hcsp/inheritance/Dog.java
index 24e713a..f7942c3 100644
--- a/src/main/java/com/github/hcsp/inheritance/Dog.java
+++ b/src/main/java/com/github/hcsp/inheritance/Dog.java
@@ -1,15 +1,16 @@
 package com.github.hcsp.inheritance;
 
-public class Dog {
+public class Dog extends Animal{
     private String name;
 
     public Dog(String name) {
-        this.name = name;
+        super(name);
     }
 
-    public void sayMyName() {
-        System.out.println("我的名字是" + name);
-    }
+
+    // public void sayMyName() {
+    //    System.out.println("我的名字是" + name);
+
 
     public void wang() {
         System.out.println("汪" + name);
diff --git a/src/main/java/com/github/hcsp/inheritance/Rat.java b/src/main/java/com/github/hcsp/inheritance/Rat.java
index bc517d1..00bd7dc 100644
--- a/src/main/java/com/github/hcsp/inheritance/Rat.java
+++ b/src/main/java/com/github/hcsp/inheritance/Rat.java
@@ -1,15 +1,12 @@
 package com.github.hcsp.inheritance;
 
-public class Rat {
+public class Rat extends Animal{
     private String name;
 
     public Rat(String name) {
-        this.name = name;
+        super(name);
     }
 
-    public void sayMyName() {
-        System.out.println("我的名字是" + name);
-    }
 
     public void zhizhi() {
         System.out.println("吱吱" + name);