diff --git a/day09/src/com/inmind/extends_contructor04/Demo06.java b/day09/src/com/inmind/extends_contructor04/Demo06.java
new file mode 100644
index 0000000..86304c3
--- /dev/null
+++ b/day09/src/com/inmind/extends_contructor04/Demo06.java
@@ -0,0 +1,15 @@
+package com.inmind.extends_contructor04;
+/*
+继承中构造方法的访问特点
+1.创建子类对象时，一定会调用父类的构造方法
+2.super调用父类的构造方法时，必须在子类的构造方法的第一行
+3.super可以调用父类的有参构造方法。
+ */
+public class Demo06 {
+    public static void main(String[] args) {
+        Fu fu = new Fu();
+        System.out.println("------");
+        Zi zi = new Zi();
+        System.out.println("程序结束");
+    }
+}
diff --git a/day09/src/com/inmind/extends_contructor04/Fu.java b/day09/src/com/inmind/extends_contructor04/Fu.java
new file mode 100644
index 0000000..3698841
--- /dev/null
+++ b/day09/src/com/inmind/extends_contructor04/Fu.java
@@ -0,0 +1,17 @@
+package com.inmind.extends_contructor04;
+
+public class Fu {
+    String name;
+    int age;
+    //默认无参构造
+    public Fu(){
+        System.out.println("父类无参构造方法被调用了");
+    }
+
+    public Fu(String name,int age){
+        System.out.println("父类有参构造方法被调用了");
+        this.name = name;
+        this.age = age;
+    }
+
+}
diff --git a/day09/src/com/inmind/extends_contructor04/Zi.java b/day09/src/com/inmind/extends_contructor04/Zi.java
new file mode 100644
index 0000000..a1a3463
--- /dev/null
+++ b/day09/src/com/inmind/extends_contructor04/Zi.java
@@ -0,0 +1,9 @@
+package com.inmind.extends_contructor04;
+
+public class Zi extends Fu{
+    //默认无参构造
+    public Zi(){
+        super("张飞",20);
+        System.out.println("子类无参构造方法被调用了");
+    }
+}