diff --git a/day09/src/com/inmind/abstract06/Animal.java b/day09/src/com/inmind/abstract06/Animal.java
new file mode 100644
index 0000000..dba8450
--- /dev/null
+++ b/day09/src/com/inmind/abstract06/Animal.java
@@ -0,0 +1,8 @@
+package com.inmind.abstract06;
+
+//抽象类
+public abstract class Animal {
+
+    //抽象方法
+    public abstract void eat();
+}
diff --git a/day09/src/com/inmind/abstract06/Demo10.java b/day09/src/com/inmind/abstract06/Demo10.java
new file mode 100644
index 0000000..d445062
--- /dev/null
+++ b/day09/src/com/inmind/abstract06/Demo10.java
@@ -0,0 +1,12 @@
+package com.inmind.abstract06;
+/*
+    当一个方法的具体功能，我们无法实现，那么就不要写方法体，abstract修饰，就是抽象方法
+    拥有抽象方法的类，也就是一个抽象类
+
+    抽象类的格式：
+    public abstract class 类名{
+        public abstract void 方法名(参数列表);
+    }
+ */
+public class Demo10 {
+}
diff --git a/day09/src/com/inmind/abstract06/Dog.java b/day09/src/com/inmind/abstract06/Dog.java
new file mode 100644
index 0000000..e82573e
--- /dev/null
+++ b/day09/src/com/inmind/abstract06/Dog.java
@@ -0,0 +1,9 @@
+package com.inmind.abstract06;
+
+public class Dog extends Animal{
+
+    @Override
+    public void eat() {
+        System.out.println("狗吃骨头");
+    }
+}