diff --git a/day08/src/com/inmind/arrays03/ArraysDemo10.java b/day08/src/com/inmind/arrays03/ArraysDemo10.java
new file mode 100644
index 0000000..cba0740
--- /dev/null
+++ b/day08/src/com/inmind/arrays03/ArraysDemo10.java
@@ -0,0 +1,25 @@
+package com.inmind.arrays03;
+
+import java.util.Arrays;
+
+/*
+arrays类的2个工具类方法
+
+public static String toString(int[] a) ：返回指定数组内容的字符串表示形式。
+
+public static void sort(int[] a) ：对指定的 int 型数组按数字升序进行排序。
+
+ */
+public class ArraysDemo10 {
+    public static void main(String[] args) {
+        int[] arr = {1, 2, 3, 4, 5};
+        System.out.println(arr);//[I@4eec7777
+        //查看对应数组的内容
+        System.out.println(Arrays.toString(arr));
+        String[] arr1 = {"hello", "java"};
+        System.out.println(Arrays.toString(arr1));
+        int[] arr2 = {1,222,33,4,555,6};
+        Arrays.sort(arr2);//升序排序
+        System.out.println(Arrays.toString(arr2));
+    }
+}