From 6273776e556eab2da752bcdafcf2a657709f7129 Mon Sep 17 00:00:00 2001
From: johnA1331 <53036378+johnA1331@users.noreply.github.com>
Date: Wed, 26 Jan 2022 17:31:09 +0800
Subject: [PATCH] Update README.md

---
 java-collections-maps-3/README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/java-collections-maps-3/README.md b/java-collections-maps-3/README.md
index 87817331b5..75842c85a4 100644
--- a/java-collections-maps-3/README.md
+++ b/java-collections-maps-3/README.md
@@ -6,3 +6,4 @@
 - [Optimizing HashMap’s Performance](https://www.baeldung.com/java-hashmap-optimize-performance)
 - [Update the Value Associated With a Key in a HashMap](https://www.baeldung.com/java-hashmap-update-value-by-key)
 - [Java Map – keySet() vs. entrySet() vs. values() Methods](https://www.baeldung.com/java-map-entries-methods)
+- [Java IdentityHashMap Class and Its Use Cases](https://www.baeldung.com/java-identityhashmap)