From 4c08e64e1f705236e5056b2f8d049317add5ac5d Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 23 May 2026 13:24:00 +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/abstract05/Animal.java |  5 +++++
 day09/src/com/inmind/abstract05/Cat.java    | 10 ++++++++++
 day09/src/com/inmind/abstract05/Demo06.java | 16 ++++++++++++++++
 day09/src/com/inmind/abstract05/Dog.java    | 14 ++++++++++++++
 4 files changed, 45 insertions(+)
 create mode 100644 day09/src/com/inmind/abstract05/Cat.java
 create mode 100644 day09/src/com/inmind/abstract05/Dog.java

diff --git a/day09/src/com/inmind/abstract05/Animal.java b/day09/src/com/inmind/abstract05/Animal.java
index 3aea8bf..5db1900 100644
--- a/day09/src/com/inmind/abstract05/Animal.java
+++ b/day09/src/com/inmind/abstract05/Animal.java
@@ -6,6 +6,11 @@ package com.inmind.abstract05;
  */
 public abstract class Animal {
 
+    public Animal(){
+        System.out.println("抽象类Animal的构造方法");
+    }
+
+
     //动物吃的方法
     public abstract void eat();
 
diff --git a/day09/src/com/inmind/abstract05/Cat.java b/day09/src/com/inmind/abstract05/Cat.java
new file mode 100644
index 0000000..91b8daa
--- /dev/null
+++ b/day09/src/com/inmind/abstract05/Cat.java
@@ -0,0 +1,10 @@
+package com.inmind.abstract05;
+
+public class Cat extends Animal{
+
+
+    @Override
+    public void eat() {
+        System.out.println("猫吃鱼");
+    }
+}
diff --git a/day09/src/com/inmind/abstract05/Demo06.java b/day09/src/com/inmind/abstract05/Demo06.java
index dfdee27..ec338d9 100644
--- a/day09/src/com/inmind/abstract05/Demo06.java
+++ b/day09/src/com/inmind/abstract05/Demo06.java
@@ -1,6 +1,22 @@
 package com.inmind.abstract05;
 /*
+如何使用抽象类和抽象方法???
+1.抽象类不能被创建对象的，只能通过子类创建对象
+2.非抽象的子类，必须实现重写抽象类中的抽象方法
+3.创建子类对象，调用对应方法
 
+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 Demo06 {
+    public static void main(String[] args) {
+        //Animal animal = new Animal();
+        Dog dog = new Dog();
+        dog.eat();
+        Cat cat = new Cat();
+        cat.eat();
+    }
 }
diff --git a/day09/src/com/inmind/abstract05/Dog.java b/day09/src/com/inmind/abstract05/Dog.java
new file mode 100644
index 0000000..659a679
--- /dev/null
+++ b/day09/src/com/inmind/abstract05/Dog.java
@@ -0,0 +1,14 @@
+package com.inmind.abstract05;
+
+public class Dog extends Animal{
+
+    //编译器主动添加默认无参构造
+    public Dog(){
+        super();
+    }
+
+    @Override
+    public void eat(){
+        System.out.println("狗吃骨头");
+    };
+}