diff --git a/Java/odd-string-difference.java b/Java/odd-string-difference.java
new file mode 100644
index 00000000..80a01ef4
--- /dev/null
+++ b/Java/odd-string-difference.java
@@ -0,0 +1,26 @@
+class Solution {
+    public String oddString(String[] words) {
+        int matchesFirst = 0;
+        int mismatchIdx = -1;
+        for (int i = 1; i < words.length; i++) {
+            if (matchesDiff(words[0], words[i])) {
+                matchesFirst++;
+            } else {
+                mismatchIdx = i;
+            }
+        }
+        if (matchesFirst == 0) {
+            return words[0];
+        }
+        return words[mismatchIdx];
+    }
+
+    private static boolean matchesDiff(String a, String b) {
+        for (int i = 0; i < a.length() - 1; i++) {
+            if (a.charAt(i + 1) - a.charAt(i) != b.charAt(i + 1) - b.charAt(i)) {
+                return false;
+            }
+        }
+        return true;
+    }
+}