From bc615c4b4775d9e4c8fe1287fb43fcbb54877caf Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Fri, 23 Jan 2026 10:07:18 +0800
Subject: [PATCH] =?UTF-8?q?day09-=E6=8A=BD=E8=B1=A1=E6=96=B9=E6=B3=95?=
 =?UTF-8?q?=E5=92=8C=E6=8A=BD=E8=B1=A1=E7=B1=BB=E7=9A=84=E4=BD=BF=E7=94=A8?=
 =?UTF-8?q?=E4=BB=A5=E5=8F=8A=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/abstract07/Animal.java | 17 +++++++++++++++++
 day09/src/com/inmind/abstract07/Cat.java    | 10 ++++++++++
 day09/src/com/inmind/abstract07/Demo07.java | 18 ++++++++++++++++++
 day09/src/com/inmind/abstract07/Dog.java    | 10 ++++++++++
 4 files changed, 55 insertions(+)

diff --git a/day09/src/com/inmind/abstract07/Animal.java b/day09/src/com/inmind/abstract07/Animal.java
index 017600c..bb5eb95 100644
--- a/day09/src/com/inmind/abstract07/Animal.java
+++ b/day09/src/com/inmind/abstract07/Animal.java
@@ -2,7 +2,24 @@ package com.inmind.abstract07;
 
 //抽象类
 public abstract class Animal {
+    int age;
+    String name;
+    String color;
+    //抽象类的无参构造
+    public Animal(){
+
+    }
+
+    //抽象类的有参构造
+    public Animal(String name){
+        this.name = name;
+    }
+
 
     //所有动物都必须实现的行为（吃）
     public abstract void eat();//抽象方法：没有方法体的方法
+
+    public abstract void eat1();
+
+    public abstract void eat2();
 }
diff --git a/day09/src/com/inmind/abstract07/Cat.java b/day09/src/com/inmind/abstract07/Cat.java
index ced32ee..afecbdb 100644
--- a/day09/src/com/inmind/abstract07/Cat.java
+++ b/day09/src/com/inmind/abstract07/Cat.java
@@ -6,4 +6,14 @@ public  class Cat extends Animal{
     public void eat() {
         System.out.println("猫吃鱼");
     }
+
+    @Override
+    public void eat1() {
+
+    }
+
+    @Override
+    public void eat2() {
+
+    }
 }
diff --git a/day09/src/com/inmind/abstract07/Demo07.java b/day09/src/com/inmind/abstract07/Demo07.java
index 7513e20..cd2f59f 100644
--- a/day09/src/com/inmind/abstract07/Demo07.java
+++ b/day09/src/com/inmind/abstract07/Demo07.java
@@ -1,4 +1,22 @@
 package com.inmind.abstract07;
+/*
+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：
+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。
+ */
 public class Demo07 {
+    public static void main(String[] args) {
+//        Animal a = new Animal();
+        Dog dog = new Dog();
+        dog.eat();
+        Cat cat = new Cat();
+        cat.eat();
+    }
 }
diff --git a/day09/src/com/inmind/abstract07/Dog.java b/day09/src/com/inmind/abstract07/Dog.java
index 7f4e3e9..77e2d43 100644
--- a/day09/src/com/inmind/abstract07/Dog.java
+++ b/day09/src/com/inmind/abstract07/Dog.java
@@ -5,4 +5,14 @@ public class Dog extends Animal{
     public void eat() {
         System.out.println("狗吃骨头");
     }
+
+    @Override
+    public void eat1() {
+
+    }
+
+    @Override
+    public void eat2() {
+
+    }
 }