From 79ad38dcc60e10fb4afe5fe7cff15d31e7b0ce27 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Tue, 28 Jul 2026 14:42:25 +0800
Subject: [PATCH] =?UTF-8?q?s-day01-Object=E6=A6=82=E8=BF=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 s-day01/src/com/inmind/object01/Demo01.java  | 23 ++++++++++++++++++++
 s-day01/src/com/inmind/object01/Person.java  |  4 ++++
 s-day01/src/com/inmind/object01/Student.java |  4 ++++
 3 files changed, 31 insertions(+)
 create mode 100644 s-day01/src/com/inmind/object01/Demo01.java
 create mode 100644 s-day01/src/com/inmind/object01/Person.java
 create mode 100644 s-day01/src/com/inmind/object01/Student.java

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{
+}