diff --git a/day10/src/com/inmind/duotai08/Demo08.java b/day10/src/com/inmind/duotai08/Demo08.java
new file mode 100644
index 0000000..1dc1bd6
--- /dev/null
+++ b/day10/src/com/inmind/duotai08/Demo08.java
@@ -0,0 +1,18 @@
+package com.inmind.duotai08;
+/*
+多态的格式和使用
+
+多态的前提：【重点】
+继承或者实现【二选一】    类与类的继承  实现类与接口的实现
+方法的重写【意义体现：不重写，无意义】
+父类引用指向子类对象【格式体现】
+ */
+public class Demo08 {
+    public static void main(String[] args) {
+        Zi zi = new Zi();//不是多态，只是简单的面向对象
+        Fu fu = new Zi();//父类引用指向子类对象【格式体现】
+        fu.methodFu();
+        fu.method();//多态写法
+        //多态是为了更好的封装，是动态的框架设计技术，扩展
+    }
+}
diff --git a/day10/src/com/inmind/duotai08/Fu.java b/day10/src/com/inmind/duotai08/Fu.java
new file mode 100644
index 0000000..8f41398
--- /dev/null
+++ b/day10/src/com/inmind/duotai08/Fu.java
@@ -0,0 +1,14 @@
+package com.inmind.duotai08;
+
+public class Fu {
+    int numFu = 10;
+    int num = 20;
+
+    public void methodFu(){
+        System.out.println("父类的methodFu方法");
+    }
+
+    public void method(){
+        System.out.println("父类的method方法");
+    }
+}
diff --git a/day10/src/com/inmind/duotai08/Zi.java b/day10/src/com/inmind/duotai08/Zi.java
new file mode 100644
index 0000000..25a4514
--- /dev/null
+++ b/day10/src/com/inmind/duotai08/Zi.java
@@ -0,0 +1,15 @@
+package com.inmind.duotai08;
+
+public class Zi extends Fu{
+    int numZi = 30;
+    int num = 40;
+
+    public void methodZi(){
+        System.out.println("子类的methodZi方法");
+    }
+
+    @Override
+    public void method(){
+        System.out.println("子类的method方法");
+    }
+}