From 14359ab2da37cc9b52e196092c2e2c2dbdbc59ce Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Sat, 18 Jul 2026 16:16:29 +0800
Subject: [PATCH] =?UTF-8?q?day05-=E6=95=B0=E7=BB=84=E7=9A=84=E5=BC=82?=
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---
 day05/src/com/inmind/array01/Demo05.java | 30 ++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 day05/src/com/inmind/array01/Demo05.java

diff --git a/day05/src/com/inmind/array01/Demo05.java b/day05/src/com/inmind/array01/Demo05.java
new file mode 100644
index 0000000..831a9b1
--- /dev/null
+++ b/day05/src/com/inmind/array01/Demo05.java
@@ -0,0 +1,30 @@
+package com.inmind.array01;
+
+/**
+ * 数组的异常_索引越界异常
+ * ArrayIndexOutOfBoundsException
+ * 数组索引越界异常
+ * 注意：数组的长度固定不变的，数组的最大的索引值为arr.length-1
+ * 0~(arr.length-1)
+ *
+ * ----------------------------------
+ * 数组的异常_空指针异常
+ * NullPointerException
+ * 引用数据类型如果没有赋值，或为null时候，不能操作！！！！
+ */
+public class Demo05 {
+    public static void main(String[] args) {
+        int[] arr = {1, 2, 3};
+        System.out.println(arr[0]);
+        System.out.println(arr[1]);
+        System.out.println(arr[2]);
+        System.out.println("程序结束");
+        System.out.println("------------------------");
+        //空常量：null，给引用数据类型赋初始化值的
+        arr = null;//将数组引用赋值为null
+        if (arr != null) {//健壮性判断，避免程序报错
+            System.out.println(arr[0]);//0
+        }
+        System.out.println("程序结束");
+    }
+}