Merge pull request #11875 from Asjad-J/master

Updated README.md files

core-java-modules/core-java-collections-maps-4/README.md

@@ -6,3 +6,5 @@ This module contains articles about Map data structures in Java.
 - [Using a Custom Class as a Key in a Java HashMap](https://www.baeldung.com/java-custom-class-map-key)
 - [Nested HashMaps Examples in Java](https://www.baeldung.com/java-nested-hashmaps)
 - [Java HashMap With Different Value Types](https://www.baeldung.com/java-hashmap-different-value-types)
+- [Difference Between Map and HashMap in Java](https://www.baeldung.com/java-map-vs-hashmap)
+- [How to Create a New Entry in a Map](https://www.baeldung.com/java-map-new-entry)

core-java-modules/core-java-concurrency-advanced-4/README.md

@@ -4,3 +4,4 @@
 - [Bad Practices With Synchronization](https://www.baeldung.com/java-synchronization-bad-practices)
 - [Start Two Threads at the Exact Same Time in Java](https://www.baeldung.com/java-start-two-threads-at-same-time)
 - [Volatile Variables and Thread Safety](https://www.baeldung.com/java-volatile-variables-thread-safety)
+- [Producer-Consumer Problem With Example in Java](https://www.baeldung.com/java-producer-consumer-problem)

core-java-modules/core-java-exceptions-4/README.md

@@ -1,3 +1,4 @@
 ### Relevant Articles:
 
 - [Java ArrayIndexOutOfBoundsException](https://www.baeldung.com/java-arrayindexoutofboundsexception)
+- [Java Missing Return Statement](https://www.baeldung.com/java-missing-return-statement)

docker/README.md

@@ -7,3 +7,4 @@
 - [Dockerfile Strategies for Git](https://www.baeldung.com/ops/dockerfile-git-strategies)
 - [How to Get Docker-Compose to Always Use the Latest Image](https://www.baeldung.com/ops/docker-compose-latest-image)
 - [How to Include Files Outside of Docker’s Build Context](https://www.baeldung.com/ops/docker-include-files-outside-build-context)
+- [Caching Maven Dependencies with Docker](https://www.baeldung.com/ops/docker-cache-maven-dependencies)

javax-servlets-2/README.md

@@ -3,3 +3,4 @@
 This module contains articles about Servlets.
 
 ### Relevant Articles:
+- [Check if a User Is Logged-in With Servlets and JSP](https://www.baeldung.com/servlets-jsp-check-user-login)

maven-modules/maven-classifier/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [A Guide to Maven Artifact Classifiers](https://www.baeldung.com/maven-artifact-classifiers)

spring-cloud/spring-cloud-gateway/README.md

@@ -9,3 +9,4 @@ This module contains articles about Spring Cloud Gateway
 - [Spring Cloud Gateway Routing Predicate Factories](https://www.baeldung.com/spring-cloud-gateway-routing-predicate-factories)
 - [Spring Cloud Gateway WebFilter Factories](https://www.baeldung.com/spring-cloud-gateway-webfilter-factories)
 - [Using Spring Cloud Gateway with OAuth 2.0 Patterns](https://www.baeldung.com/spring-cloud-gateway-oauth2)
+- [URL Rewriting With Spring Cloud Gateway](https://www.baeldung.com/spring-cloud-gateway-url-rewriting)

spring-security-modules/spring-security-web-boot-3/README.md

@@ -12,4 +12,5 @@ The "REST With Spring" Classes: http://github.learnspringsecurity.com
 - [Spring Security – Cache Control Headers](https://www.baeldung.com/spring-security-cache-control-headers)
 - [Fixing 401s with CORS Preflights and Spring Security](https://www.baeldung.com/spring-security-cors-preflight)
 - [Content Security Policy with Spring Security](https://www.baeldung.com/spring-security-csp)
+- [Enable Logging for Spring Security](https://www.baeldung.com/spring-security-enable-logging)
 - More articles: [[<-- prev]](/spring-security-modules/spring-security-web-boot-2)