From 303ce5bc0eb0a80fbbde26c8f967d248ab73eb8d Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Thu, 25 Dec 2025 15:14:17 +0800
Subject: [PATCH] =?UTF-8?q?day05-=E6=95=B0=E7=BB=84=E7=9A=84=E5=86=85?=
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---
 day05/src/com/inmind/Demo02_array_memory.java | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 day05/src/com/inmind/Demo02_array_memory.java

diff --git a/day05/src/com/inmind/Demo02_array_memory.java b/day05/src/com/inmind/Demo02_array_memory.java
new file mode 100644
index 0000000..043fe95
--- /dev/null
+++ b/day05/src/com/inmind/Demo02_array_memory.java
@@ -0,0 +1,33 @@
+package com.inmind;
+/*
+数组的操作
+    二进制：0~1
+    八进制：0~7
+    十进制：0~9
+    十六进制：0~15，  0~9 10（a）、11（b）、12(c)、13(d)、14(e)、15(f)
+ */
+public class Demo02_array_memory {
+    public static void main(String[] args) {
+        //定义一个数据不确定的长度为3的存放整型的数组
+        int[] arr = new int[3];
+        System.out.println(arr);//[I@50cbc42f
+         /*
+        [I@50cbc42f
+        [I:表示当前是一个数组数据类型，数组存放的数据类型是int
+        50cbc42f：表示数组在内存中开辟的空间地址
+
+        索引：操作数组指定空间的值，从0开始
+         */
+
+        System.out.println(arr[0]);//0
+        System.out.println(arr[1]);//0
+        System.out.println(arr[2]);//0
+        double[] dArr = new double[3];
+        System.out.println(dArr[0]);//0.0
+        System.out.println(dArr[1]);//0.0
+        System.out.println(dArr[2]);//0.0
+        System.out.println("-------------------");
+        //注意：数组的最大索引= 数组.length -1;
+        //System.out.println(dArr[3]);//(数组越界异常)java.lang.ArrayIndexOutOfBoundsException: Index 3 out of bounds for length 3
+    }
+}