diff --git a/problems/背包理论基础01背包-2.md b/problems/背包理论基础01背包-2.md
index e85d31b4..075bb5b1 100644
--- a/problems/背包理论基础01背包-2.md
+++ b/problems/背包理论基础01背包-2.md
@@ -214,7 +214,7 @@ int main() {
 Java：
 
 ```java
-		public static void main(String[] args) {
+    public static void main(String[] args) {
         int[] weight = {1, 3, 4};
         int[] value = {15, 20, 30};
         int bagWight = 4;