diff --git a/s-day01/src/com/inmind/object01/Demo01.java b/s-day01/src/com/inmind/object01/Demo01.java
new file mode 100644
index 0000000..f9d1f3d
--- /dev/null
+++ b/s-day01/src/com/inmind/object01/Demo01.java
@@ -0,0 +1,23 @@
+package com.inmind.object01;
+/*
+Object类:所有类的父类【祖宗类】，java中所有的类直接或者间接继承自Object
+ */
+public class Demo01 {
+    public static void main(String[] args) {
+        Person p = new Person();
+        Student s = new Student();
+        //Object类的多态
+        Object o1 = p;
+        Object o2 = new Person();
+        Object o3 = new Student();
+        //Object是可以接受任意引用数据类型！！！！！
+        Object o4 = "123";
+        method(p);
+        method(s);
+        method("abc");
+    }
+
+    public static Object method(Object o) {
+        return null;
+    }
+}
diff --git a/s-day01/src/com/inmind/object01/Person.java b/s-day01/src/com/inmind/object01/Person.java
new file mode 100644
index 0000000..848ec97
--- /dev/null
+++ b/s-day01/src/com/inmind/object01/Person.java
@@ -0,0 +1,4 @@
+package com.inmind.object01;
+//直接继承Object类
+public class Person extends Object{
+}
diff --git a/s-day01/src/com/inmind/object01/Student.java b/s-day01/src/com/inmind/object01/Student.java
new file mode 100644
index 0000000..3682aeb
--- /dev/null
+++ b/s-day01/src/com/inmind/object01/Student.java
@@ -0,0 +1,4 @@
+package com.inmind.object01;
+//间接继承Object类
+public class Student extends Person{
+}