diff --git a/core-java-collections/README.md b/core-java-collections/README.md
index 710be31a08..80d4385c45 100644
--- a/core-java-collections/README.md
+++ b/core-java-collections/README.md
@@ -32,3 +32,4 @@
 - [A Guide to Iterator in Java](http://www.baeldung.com/java-iterator)
 - [Differences Between HashMap and Hashtable](https://www.baeldung.com/hashmap-hashtable-differences)
 - [Java ArrayList vs Vector](https://www.baeldung.com/java-arraylist-vs-vector)
+- [Defining a Char Stack in Java](https://www.baeldung.com/java-char-stack)