From f6cdc32d8cb2f2f07d982fae20080677ae72752e Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Wed, 23 Sep 2026 13:48:42 +0800
Subject: [PATCH] =?UTF-8?q?day09--=E7=BB=A7=E6=89=BF=E4=B8=AD=E6=9E=84?=
 =?UTF-8?q?=E9=80=A0=E6=96=B9=E6=B3=95=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

---
 .../com/inmind/extends_constructor04/Demo07.java   | 13 +++++++++++++
 day09/src/com/inmind/extends_constructor04/Fu.java | 14 ++++++++++++++
 day09/src/com/inmind/extends_constructor04/Zi.java | 10 ++++++++++
 3 files changed, 37 insertions(+)
 create mode 100644 day09/src/com/inmind/extends_constructor04/Demo07.java
 create mode 100644 day09/src/com/inmind/extends_constructor04/Fu.java
 create mode 100644 day09/src/com/inmind/extends_constructor04/Zi.java

diff --git a/day09/src/com/inmind/extends_constructor04/Demo07.java b/day09/src/com/inmind/extends_constructor04/Demo07.java
new file mode 100644
index 0000000..73b6856
--- /dev/null
+++ b/day09/src/com/inmind/extends_constructor04/Demo07.java
@@ -0,0 +1,13 @@
+package com.inmind.extends_constructor04;
+/*
+继承中构造方法的访问特点：
+1.创建子类对象时，一定会先调用父类的构造方法
+2.super调用父类的构造方法时，必须在子类构造方法的第一行
+3.super可以调用父类的有参，无参构造方法，但必须在子类构造方法的第一行调用
+ */
+public class Demo07 {
+    public static void main(String[] args) {
+        Zi zi = new Zi();
+        System.out.println("程序结束");
+    }
+}
diff --git a/day09/src/com/inmind/extends_constructor04/Fu.java b/day09/src/com/inmind/extends_constructor04/Fu.java
new file mode 100644
index 0000000..775847e
--- /dev/null
+++ b/day09/src/com/inmind/extends_constructor04/Fu.java
@@ -0,0 +1,14 @@
+package com.inmind.extends_constructor04;
+
+public class Fu {
+    int i;
+
+    /*public Fu(){
+        System.out.println("父类的无参构造执行了");
+    }*/
+
+    public Fu(int i){
+        this.i = i;
+        System.out.println("父类的有参构造执行了");
+    }
+}
diff --git a/day09/src/com/inmind/extends_constructor04/Zi.java b/day09/src/com/inmind/extends_constructor04/Zi.java
new file mode 100644
index 0000000..ea374d4
--- /dev/null
+++ b/day09/src/com/inmind/extends_constructor04/Zi.java
@@ -0,0 +1,10 @@
+package com.inmind.extends_constructor04;
+
+public class Zi extends Fu{
+
+    public Zi(){
+        //super();//如果没写super(),编译器会主动地在第一行主动添加
+        super(1);
+        System.out.println("子类的无参构造执行了");
+    }
+}