diff --git a/problems/0541.反转字符串II.md b/problems/0541.反转字符串II.md
index 02713c65..914fba23 100644
--- a/problems/0541.反转字符串II.md
+++ b/problems/0541.反转字符串II.md
@@ -152,7 +152,35 @@ class Solution {
     }
 }
 ```
+```java
+// 解法3
+class Solution {
+    public String reverseStr(String s, int k) {
+        char[] ch = s.toCharArray();
+        // 1. 每隔 2k 个字符的前 k 个字符进行反转
+        for (int i = 0; i< ch.length; i += 2 * k) {
+            // 2. 剩余字符小于 2k 但大于或等于 k 个，则反转前 k 个字符
+            if (i + k <= ch.length) {
+                reverse(ch, i, i + k -1);
+                continue;
+            }
+            // 3. 剩余字符少于 k 个，则将剩余字符全部反转
+            reverse(ch, i, ch.length - 1);
+        }
+        return  new String(ch);
 
+    }
+    // 定义翻转函数
+    public void reverse(char[] ch, int i, int j) {
+    for (; i < j; i++, j--) {
+        char temp  = ch[i];
+        ch[i] = ch[j];
+        ch[j] = temp;
+    }
+
+    }
+}
+```
 Python：
 ```python
 class Solution: