From 7d5c4ac59058c708b84ae6e323dbc4ba89d41e9a Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 25 Jul 2026 11:54:01 +0800
Subject: [PATCH] =?UTF-8?q?day09-=E7=BB=A7=E6=89=BF=E4=B8=AD=E6=96=B9?=
 =?UTF-8?q?=E6=B3=95=E7=9A=84=E8=A6=86=E7=9B=96=E9=87=8D=E5=86=99=5F?=
 =?UTF-8?q?=E6=A6=82=E5=BF=B5=E4=B8=8E=E7=89=B9=E7=82=B9=E4=BB=A5=E5=8F=8A?=
 =?UTF-8?q?=E6=B3=A8=E6=84=8F=E4=BA=8B=E9=A1=B9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 day09/src/com/inmind/extends03/Demo03.java | 13 +++++++++++++
 day09/src/com/inmind/extends03/Fu.java     |  5 +++++
 day09/src/com/inmind/extends03/Zi.java     |  7 ++++++-
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/day09/src/com/inmind/extends03/Demo03.java b/day09/src/com/inmind/extends03/Demo03.java
index 6d1f823..124a1fa 100644
--- a/day09/src/com/inmind/extends03/Demo03.java
+++ b/day09/src/com/inmind/extends03/Demo03.java
@@ -1,6 +1,19 @@
 package com.inmind.extends03;
 /*
 继承中成员方法的访问特点:在继承中访问成员方法时，new的是谁，就优先使用谁的成员方法，如果没有则向上找
+----------------------------------------------------------------
+重载（overload） :在同一个类中，方法名相同，参数列表不同（类型，数量，顺序）
+重写(override) :在父子类中，方法名相同，参数列表相同,返回值类型相同
+
+ @Override：验证是否是重写的注解
+
+java中的4种权限：public > protected>(default)不写就是默认权限>private
+
+重写的注意事项：
+1.子类方法重写父类方法时，必须保证权限大于等于父类的权限
+2.private的内容不能继承的，也就不能重写
+3.返回值类型，方法名和参数列表保持一致
+
  */
 public class Demo03 {
     public static void main(String[] args) {
diff --git a/day09/src/com/inmind/extends03/Fu.java b/day09/src/com/inmind/extends03/Fu.java
index c7c7fb5..9637e16 100644
--- a/day09/src/com/inmind/extends03/Fu.java
+++ b/day09/src/com/inmind/extends03/Fu.java
@@ -4,4 +4,9 @@ public class Fu {
     public void methodFu() {
         System.out.println("父类方法");
     }
+
+    public int method(int i){
+        System.out.println("父类的同名方法");
+        return 1;
+    }
 }
diff --git a/day09/src/com/inmind/extends03/Zi.java b/day09/src/com/inmind/extends03/Zi.java
index 3d24d02..e8af6e7 100644
--- a/day09/src/com/inmind/extends03/Zi.java
+++ b/day09/src/com/inmind/extends03/Zi.java
@@ -1,7 +1,12 @@
 package com.inmind.extends03;
-
 public class Zi extends Fu{
     public void methodZi(){
         System.out.println("子类方法");
     }
+
+    @Override//注解：作用是标记当前方法是重写的方法
+    public int method(int i){
+        System.out.println("子类的同名方法");
+        return 10;
+    }
 }