From 329b2a7397b34417b95225aa716284322e93f7cc Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 18 Jul 2026 15:07:06 +0800
Subject: [PATCH] =?UTF-8?q?day05-=E6=95=B0=E7=BB=84=E7=9A=84=E6=93=8D?=
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---
 day05/src/com/inmind/array01/Demo02.java | 31 ++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 day05/src/com/inmind/array01/Demo02.java

diff --git a/day05/src/com/inmind/array01/Demo02.java b/day05/src/com/inmind/array01/Demo02.java
new file mode 100644
index 0000000..0d05fbd
--- /dev/null
+++ b/day05/src/com/inmind/array01/Demo02.java
@@ -0,0 +1,31 @@
+package com.inmind.array01;
+/*
+- 数组中有索引（门牌号），从0开始递增
+- 数组中有个length属性，数组.length获取数组固定的长度
+- 数组取值：int a = 数组[索引]
+- 数组赋值：数组[索引] = 值
+ */
+public class Demo02 {
+    public static void main(String[] args) {
+        //动态创建数组1
+        int[] arr1 = new int[3];
+        //静态创建数组2
+        int[] arr2 = new int[]{1,2};
+
+        //证明数组的长度，数组有个属性length
+        System.out.println(arr1.length);//3
+        System.out.println(arr2.length);//2
+        //打印arr1的第二个空间的值
+        int value = arr1[1];
+        System.out.println(value);//0
+        //修改arr1的第二个空间的值为10；
+        arr1[1] = 10;
+        value = arr1[1];
+        System.out.println(value);//10
+        System.out.println("-------------------");
+        //查看arr2的第二个空间的值
+        System.out.println(arr2[1]);//2
+        //虽然arr2的长度为2，能否查看arr2的第三个空间的值？？不能，否则java.lang.ArrayIndexOutOfBoundsException
+        //System.out.println(arr2[2]);
+    }
+}