diff --git a/data-structure-algorithm/src/main/java/arithmetic/BubbleSort.java b/data-structure-algorithm/src/main/java/arithmetic/BubbleSort.java
index 3fc64f8..21bbe3f 100644
--- a/data-structure-algorithm/src/main/java/arithmetic/BubbleSort.java
+++ b/data-structure-algorithm/src/main/java/arithmetic/BubbleSort.java
@@ -24,7 +24,9 @@ public static void sort(int[] arr) {
 
     public static void main(String[] args) {
         int[] arr = {9, 6, 7, 4, 5, 3, 2, 1};
-        sort(arr);
+//        sort(arr);
+        System.out.println(Arrays.toString(arr));
+        Arrays.sort(arr);
         System.out.println(Arrays.toString(arr));
     }
 }
diff --git a/data-structure-algorithm/src/main/java/arithmetic/InsertSort.java b/data-structure-algorithm/src/main/java/arithmetic/InsertSort.java
index 445e708..62e7fea 100644
--- a/data-structure-algorithm/src/main/java/arithmetic/InsertSort.java
+++ b/data-structure-algorithm/src/main/java/arithmetic/InsertSort.java
@@ -4,6 +4,7 @@
 
 /**
  * Created by 李恒名 on 2017/6/15.
+ * 插入排序
  */
 public class InsertSort {
     public static void sort(int[] arr) {
diff --git a/data-structure-algorithm/src/main/java/arithmetic/QuickSort.java b/data-structure-algorithm/src/main/java/arithmetic/QuickSort.java
index ba05c74..c0cb7c3 100644
--- a/data-structure-algorithm/src/main/java/arithmetic/QuickSort.java
+++ b/data-structure-algorithm/src/main/java/arithmetic/QuickSort.java
@@ -4,6 +4,7 @@
 
 /**
  * Created by 李恒名 on 2017/6/15.
+ * 快速排序
  */
 public class QuickSort {