From 547a9983adb33c0c952419cc4c7a29dddf309821 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Thu, 2 Apr 2026 10:49:15 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=9B=E9=98=B6day12-=E8=87=AA=E5=AE=9A?=
 =?UTF-8?q?=E4=B9=89=E6=B3=A8=E8=A7=A3?=
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---
 .../com/inmind/annotation03/MyAnnotation.java | 25 ++++++++++++
 .../src/com/inmind/annotation03/Student.java  | 40 +++++++++++++++++++
 2 files changed, 65 insertions(+)
 create mode 100644 javaSE-day12/src/com/inmind/annotation03/MyAnnotation.java
 create mode 100644 javaSE-day12/src/com/inmind/annotation03/Student.java

diff --git a/javaSE-day12/src/com/inmind/annotation03/MyAnnotation.java b/javaSE-day12/src/com/inmind/annotation03/MyAnnotation.java
new file mode 100644
index 0000000..06a5776
--- /dev/null
+++ b/javaSE-day12/src/com/inmind/annotation03/MyAnnotation.java
@@ -0,0 +1,25 @@
+package com.inmind.annotation03;
+
+import java.util.ArrayList;
+
+/*
+自定义注解
+1.注解的关键字：@interface
+2.注解中可以定义属性
+    定义属性的格式：数据类型 属性名();
+    设置默认值的属性的格式：数据类型 属性名() default 属性值;
+3.注解的属性的类型有限制
+    八大基本数据类型，String Class 注解 枚举
+    以上类型的一维数组
+4.注解中有一个特殊的属性名 value
+    当属性赋值时，如果只有一个value属性在赋值，那么value = 省略！！！
+
+5.注解如何使用：它可以修饰类，构造器，属性，方法，注解，参数
+
+6.注解在使用时，属性值必须赋值，默认值可以覆盖
+ */
+public @interface MyAnnotation {
+     public static final int age = 1;//注解中的常量
+    String name() default "张三";//name属性
+    int value();//value属性
+}
diff --git a/javaSE-day12/src/com/inmind/annotation03/Student.java b/javaSE-day12/src/com/inmind/annotation03/Student.java
new file mode 100644
index 0000000..57c8426
--- /dev/null
+++ b/javaSE-day12/src/com/inmind/annotation03/Student.java
@@ -0,0 +1,40 @@
+package com.inmind.annotation03;
+
+@MyAnnotation(name = "李四",value = 1)
+public class Student {
+    //属性（成员变量）
+    @MyAnnotation(name = "王五",value = 2)
+    String name;
+    int age;
+
+    //无参构造方法
+    @MyAnnotation(value = 1)
+    public Student() {
+    }
+
+    //满参构造方法
+    private Student(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    //行为（成员方法）
+    @MyAnnotation(1)
+    public void show(){
+        System.out.println("无参无返回值的show方法执行了");
+    }
+
+    @MyAnnotation(1)
+    private int show(@MyAnnotation(1) int i){
+        System.out.println("有参有返回值的show方法执行了");
+        return i+100;
+    }
+
+    @Override
+    public String toString() {
+        return "Student{" +
+                "name='" + name + '\'' +
+                ", age=" + age +
+                '}';
+    }
+}