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
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+++ 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");
+    }
+}