diff --git a/java-numbers-4/README.md b/java-numbers-4/README.md
index 344d348733..7db25b283c 100644
--- a/java-numbers-4/README.md
+++ b/java-numbers-4/README.md
@@ -1,3 +1,4 @@
 ### Relevant Articles:
 
 - [Probability in Java](https://www.baeldung.com/java-probability)
+- [Understanding the & 0xff Value in Java](https://www.baeldung.com/java-and-0xff)