diff --git a/core-java-modules/core-java-string-operations-7/README.md b/core-java-modules/core-java-string-operations-7/README.md
index e2ab509d8e..7a15163c4a 100644
--- a/core-java-modules/core-java-string-operations-7/README.md
+++ b/core-java-modules/core-java-string-operations-7/README.md
@@ -9,3 +9,4 @@
 - [String’s Maximum Length in Java](https://www.baeldung.com/java-strings-maximum-length)
 - [Java’s String.length() and String.getBytes().length](https://www.baeldung.com/java-string-length-vs-getbytes-length)
 - [Replace Non-Printable Unicode Characters in Java](https://www.baeldung.com/java-replace-non-printable-unicode-characters)
+- [Check If a Java StringBuilder Object Contains a Character](https://www.baeldung.com/java-check-stringbuilder-object-contains-character)