From ca77c9496b373b19dcb3eadd6b40c5dd44bd5547 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Tue, 6 Jan 2026 10:43:58 +0800
Subject: [PATCH] =?UTF-8?q?day09--=E6=8A=BD=E8=B1=A1=E7=B1=BB=E7=9A=84?=
 =?UTF-8?q?=E4=BD=BF=E7=94=A8&=E4=BD=9C=E7=94=A8?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 day09/src/com/inmind/abstract06/Animal.java   |  9 +++++-
 day09/src/com/inmind/abstract06/Cat.java      |  4 +++
 day09/src/com/inmind/abstract06/Demo08.java   | 28 +++++++++++++++++++
 day09/src/com/inmind/abstract06/Dog.java      | 19 +++++++++++++
 .../src/com/inmind/abstract06/HelloKitty.java | 18 ++++++++++++
 5 files changed, 77 insertions(+), 1 deletion(-)
 create mode 100644 day09/src/com/inmind/abstract06/Cat.java
 create mode 100644 day09/src/com/inmind/abstract06/Demo08.java
 create mode 100644 day09/src/com/inmind/abstract06/Dog.java
 create mode 100644 day09/src/com/inmind/abstract06/HelloKitty.java

diff --git a/day09/src/com/inmind/abstract06/Animal.java b/day09/src/com/inmind/abstract06/Animal.java
index bd24370..9724757 100644
--- a/day09/src/com/inmind/abstract06/Animal.java
+++ b/day09/src/com/inmind/abstract06/Animal.java
@@ -1,7 +1,14 @@
 package com.inmind.abstract06;
 
 //抽象类
-public abstract class Animal {
+public abstract  class Animal {
+
+    public Animal(){
+        System.out.println("animal抽象类的无参构造方法执行了");
+    }
+
     //动物，请问，你吃什么？？
     public abstract void eat();//抽象方法
+    public abstract void eat1();//抽象方法
+    public abstract void eat2();//抽象方法
 }
diff --git a/day09/src/com/inmind/abstract06/Cat.java b/day09/src/com/inmind/abstract06/Cat.java
new file mode 100644
index 0000000..81e3953
--- /dev/null
+++ b/day09/src/com/inmind/abstract06/Cat.java
@@ -0,0 +1,4 @@
+package com.inmind.abstract06;
+
+public abstract class Cat extends Animal{
+}
diff --git a/day09/src/com/inmind/abstract06/Demo08.java b/day09/src/com/inmind/abstract06/Demo08.java
new file mode 100644
index 0000000..a3c83b8
--- /dev/null
+++ b/day09/src/com/inmind/abstract06/Demo08.java
@@ -0,0 +1,28 @@
+package com.inmind.abstract06;
+/*
+如何使用抽象类和抽象方法？
+1.抽象类不能被创建，只能由子类“实现”了抽象类之后才能创建子类对象
+2.在子类中必须“实现重写”抽象类中的抽象方法
+3.这时创建子类的对象，并调用方法
+-------------------------------------------------
+注意事项：（在线教程中查看！！！！）
+1. 抽象类不能创建对象，如果创建，编译无法通过而报错。只能创建其非抽象子类的对象
+2. 抽象类中，可以有构造方法，是供子类创建对象时，初始化父类成员使用的
+3. 抽象类中，不一定包含抽象方法，但是有抽象方法的类必定是抽象类
+4. 抽象类的子类，必须重写抽象父类中所有的抽象方法，否则，编译无法通过而报错。除非该子类也是抽象类。
+---------------------------------------
+抽象类的意义
+抽象类的意义是对某一些功能添加约束
+重写，我已经实现了自己该有的功能，子类，可以在此基础选择性扩展功能
+ */
+public class Demo08 {
+    public static void main(String[] args) {
+        //创建一个动物类对象，调用它的eat方法
+//        Animal animal = new Animal();//错误抽象类不能创建对象
+        Dog dog = new Dog();
+        dog.eat();
+
+        HelloKitty kitty = new HelloKitty();
+        kitty.eat();
+    }
+}
diff --git a/day09/src/com/inmind/abstract06/Dog.java b/day09/src/com/inmind/abstract06/Dog.java
new file mode 100644
index 0000000..4c25d27
--- /dev/null
+++ b/day09/src/com/inmind/abstract06/Dog.java
@@ -0,0 +1,19 @@
+package com.inmind.abstract06;
+//alt+enter
+public class Dog extends Animal{
+
+    @Override
+    public void eat() {
+        System.out.println("狗吃骨头");
+    }
+
+    @Override
+    public void eat1() {
+
+    }
+
+    @Override
+    public void eat2() {
+
+    }
+}
diff --git a/day09/src/com/inmind/abstract06/HelloKitty.java b/day09/src/com/inmind/abstract06/HelloKitty.java
new file mode 100644
index 0000000..337d7b7
--- /dev/null
+++ b/day09/src/com/inmind/abstract06/HelloKitty.java
@@ -0,0 +1,18 @@
+package com.inmind.abstract06;
+
+public class HelloKitty extends Cat{
+    @Override
+    public void eat() {
+        System.out.println("我是动漫猫，不吃");
+    }
+
+    @Override
+    public void eat1() {
+
+    }
+
+    @Override
+    public void eat2() {
+
+    }
+}