diff --git a/core-java/README.md b/core-java/README.md
index 11d9fd2ee0..7617897e95 100644
--- a/core-java/README.md
+++ b/core-java/README.md
@@ -85,3 +85,4 @@
 - [A Guide to SimpleDateFormat](https://www.baeldung.com/java-simple-date-format)
 - [SSL Handshake Failures](https://www.baeldung.com/java-ssl-handshake-failures)
 - [Implementing a Binary Tree in Java](https://www.baeldung.com/java-binary-tree)
+- [Abstract Classes in Java](https://www.baeldung.com/java-abstract-class)