From 06b6d7c176eacf4800df66872e6081552977346a Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Tue, 28 Jul 2026 09:58:39 +0800
Subject: [PATCH] =?UTF-8?q?day11-final=E5=85=B3=E9=94=AE=E5=AD=97=E7=94=A8?=
 =?UTF-8?q?=E4=BA=8E=E4=BF=AE=E9=A5=B0=E5=B1=80=E9=83=A8=E5=8F=98=E9=87=8F?=
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---
 day11/src/com/inmind/final01/Demo01.java  | 43 +++++++++++++++++++++++
 day11/src/com/inmind/final01/Student.java | 11 ++++++
 2 files changed, 54 insertions(+)
 create mode 100644 day11/src/com/inmind/final01/Student.java

diff --git a/day11/src/com/inmind/final01/Demo01.java b/day11/src/com/inmind/final01/Demo01.java
index 469349a..37a2eba 100644
--- a/day11/src/com/inmind/final01/Demo01.java
+++ b/day11/src/com/inmind/final01/Demo01.java
@@ -1,4 +1,7 @@
 package com.inmind.final01;
+
+import java.util.Arrays;
+
 /*
 final:被它修饰，不能够被改变
 final的4个用法：
@@ -14,6 +17,46 @@ final与abstract是冲突，不能一起使用
 
 2:
 final关键字用于修饰方法:该方法就不能被子类重写
+
+3:
+final关键字用于修饰局部变量
+局部变量：
+1.基本数据类型：保存的值真正的值，表示该值赋值之后不能被修改的
+2.引用数据类型: 保存的值是地址值。引用数据类型地址不变，所指向的内容可以改变
  */
 public class Demo01 {
+    public static void main(String[] args) {
+        final int i = 10;//基本数据类型
+        //i = 20;//被final修饰的变量不能修改,它已经成为了常量
+        System.out.println(i);
+        System.out.println("-------------------------");
+        //引用数据类型
+        final int[] arr = {1, 2, 3};//arr中保存的是地址
+        System.out.println(arr);
+        System.out.println(Arrays.toString(arr));
+        //引用数据类型: 保存的值是地址值。引用数据类型地址不变，所指向的内容可以改变
+        //修改数组的内容
+        arr[0] = 10;
+        arr[1] = 20;
+        arr[2] = 30;
+        System.out.println(arr);
+        System.out.println(Arrays.toString(arr));
+
+        //对于类呢？？？也是一样的！！！！
+        final Student s = new Student("张三", 18);
+        System.out.println(s);
+        System.out.println(s.name);
+        System.out.println(s.age);
+        System.out.println("------------修改final修饰的对象的内容-------------");
+        s.name = "王五";
+        s.age = 20;
+        System.out.println(s);
+        System.out.println(s.name);
+        System.out.println(s.age);
+        //s = new Student("张三", 18);对final修饰的引用数据类型对象不能重新赋值
+
+
+
+
+    }
 }
diff --git a/day11/src/com/inmind/final01/Student.java b/day11/src/com/inmind/final01/Student.java
new file mode 100644
index 0000000..a43f2c3
--- /dev/null
+++ b/day11/src/com/inmind/final01/Student.java
@@ -0,0 +1,11 @@
+package com.inmind.final01;
+
+public class Student {
+    String name;
+    int age;
+
+    public Student(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+}