From 48f3db9713b4797973df4092e1500f1d5d315aed Mon Sep 17 00:00:00 2001
From: collaboratewithakash
 <38683470+collaboratewithakash@users.noreply.github.com>
Date: Fri, 4 Jan 2019 17:30:45 +0530
Subject: [PATCH] back-link added

---
 java-collections-maps/README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/java-collections-maps/README.md b/java-collections-maps/README.md
index 0b76ca1959..b4ab270448 100644
--- a/java-collections-maps/README.md
+++ b/java-collections-maps/README.md
@@ -18,3 +18,4 @@
 - [Merging Two Maps with Java 8](https://www.baeldung.com/java-merge-maps)
 - [How to Check If a Key Exists in a Map](https://www.baeldung.com/java-map-key-exists)
 - [Comparing Two HashMaps in Java](https://www.baeldung.com/java-compare-hashmaps)
+- [Immutable Map Implementations in Java](https://www.baeldung.com/java-immutable-maps)