diff --git a/problems/0844.比较含退格的字符串.md b/problems/0844.比较含退格的字符串.md
index 41791114..dccc5404 100644
--- a/problems/0844.比较含退格的字符串.md
+++ b/problems/0844.比较含退格的字符串.md
@@ -185,6 +185,36 @@ class Solution {
 }
 ```
 
+双指针：
+
+```java
+class Solution {
+public static boolean backspaceCompare(String s, String t) {
+        char[] sarray = s.toCharArray();
+        char[] tarray = t.toCharArray();
+        return generate(sarray).equals(generate(tarray));
+    }
+    public static String generate(char[] a){
+        int slow = -1;
+        int fast = 0;
+        if(a.length == 1){
+            return new String(a);
+        } else{
+            for(fast = 0; fast < a.length; fast++){
+                if(a[fast] != '#')
+                    a[++slow] = a[fast];
+                else{
+                    if(slow >= 0)
+                        slow--;
+                }
+            }
+            return new String(a,0,slow + 1);
+        }
+    }
+}
+```
+
+
 
 ### python