From 587fe1865bfaaeb8f8d8e95c3465aacb70b92989 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 25 Jul 2026 11:13:05 +0800
Subject: [PATCH] =?UTF-8?q?day09-=E7=BB=A7=E6=89=BF=E4=B8=AD=E6=88=90?=
 =?UTF-8?q?=E5=91=98=E5=8F=98=E9=87=8F=E7=9A=84=E8=AE=BF=E9=97=AE=E7=89=B9?=
 =?UTF-8?q?=E7=82=B9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 day09/src/com/inmind/extends02/Demo02.java | 18 ++++++++++++++++++
 day09/src/com/inmind/extends02/Fu.java     | 10 ++++++++++
 day09/src/com/inmind/extends02/Zi.java     | 10 ++++++++++
 3 files changed, 38 insertions(+)
 create mode 100644 day09/src/com/inmind/extends02/Demo02.java
 create mode 100644 day09/src/com/inmind/extends02/Fu.java
 create mode 100644 day09/src/com/inmind/extends02/Zi.java

diff --git a/day09/src/com/inmind/extends02/Demo02.java b/day09/src/com/inmind/extends02/Demo02.java
new file mode 100644
index 0000000..ce43e39
--- /dev/null
+++ b/day09/src/com/inmind/extends02/Demo02.java
@@ -0,0 +1,18 @@
+package com.inmind.extends02;
+/*
+.继承中成员变量(属性)的访问特点
+1.直接通过对象去访问，看对象创建语句=左边的内容，是谁就优先使用谁的成员变量，如果没有则向上（父类）找
+2.间接通过对象调用成员方法去访问，调用时，方法属于谁，就优先使用谁的成员变量，如果没有则向上（父类）找
+ */
+public class Demo02 {
+    public static void main(String[] args) {
+        //创建一个子类对象
+        Zi zi = new Zi();
+        System.out.println(zi.num);//展示的是=左边类的成员变量，zi类中有直接获取
+        System.out.println(zi.numFu);//展示的是=左边类的成员变量，zi类中没有，则向父类获取
+        System.out.println(zi.numZi);//展示的是=左边类的成员变量，zi类中有直接获取
+        //以下是间接访问
+        zi.methodZi();//30
+        zi.methodFu();//10
+    }
+}
diff --git a/day09/src/com/inmind/extends02/Fu.java b/day09/src/com/inmind/extends02/Fu.java
new file mode 100644
index 0000000..8d75717
--- /dev/null
+++ b/day09/src/com/inmind/extends02/Fu.java
@@ -0,0 +1,10 @@
+package com.inmind.extends02;
+
+public class Fu {
+    int num = 10;
+    int numFu = 20;
+
+    public void methodFu(){
+        System.out.println(num);
+    }
+}
diff --git a/day09/src/com/inmind/extends02/Zi.java b/day09/src/com/inmind/extends02/Zi.java
new file mode 100644
index 0000000..465f37f
--- /dev/null
+++ b/day09/src/com/inmind/extends02/Zi.java
@@ -0,0 +1,10 @@
+package com.inmind.extends02;
+
+public class Zi extends Fu{
+    int num = 30;
+    int numZi = 40;
+
+    public void methodZi(){
+        System.out.println(num);
+    }
+}