Merge pull request #13004 from edizor/master

Update README

core-java-modules/core-java-arrays-operations-advanced/README.md

@@ -11,3 +11,4 @@ This module contains articles about advanced operations on arrays in Java. They
 - [Comparing Arrays in Java](https://www.baeldung.com/java-comparing-arrays)
 - [Concatenate Two Arrays in Java](https://www.baeldung.com/java-concatenate-arrays)
 - [Performance of System.arraycopy() vs. Arrays.copyOf()](https://www.baeldung.com/java-system-arraycopy-arrays-copyof-performance)
+- [Slicing Arrays in Java](https://www.baeldung.com/java-slicing-arrays)

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

@@ -8,3 +8,4 @@ This module contains articles about Map data structures in Java.
 - [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)
+- [Difference Between Map and MultivaluedMap in Java](https://www.baeldung.com/java-map-vs-multivaluedmap)

core-java-modules/core-java-concurrency-2/README.md

@@ -5,4 +5,4 @@
 ### Relevant Articles: 
 - [Using a Mutex Object in Java](https://www.baeldung.com/java-mutex)
 - [Testing Multi-Threaded Code in Java](https://www.baeldung.com/java-testing-multithreaded)
-
+- [How to Check if All Runnables Are Done](https://www.baeldung.com/java-runnables-check-status)

core-java-modules/core-java-date-operations-3/README.md

@@ -4,4 +4,5 @@ This module contains articles about date operations in Java.
 ### Relevant Articles:
 
 - [Create Date From Unix Timestamp in Java](https://www.baeldung.com/java-date-unix-timestamp)
+- [Convert java.util.Date to java.sql.Date](https://www.baeldung.com/java-convert-util-date-to-sql)
 - [[<-- Prev]](/core-java-modules/core-java-date-operations-2)

core-java-modules/core-java-lang-math-3/README.md

@@ -8,4 +8,5 @@
 - [Swap Two Variables in Java](https://www.baeldung.com/java-swap-two-variables)
 - [Java Program to Find the Roots of a Quadratic Equation](https://www.baeldung.com/roots-quadratic-equation)
 - [Create a BMI Calculator in Java](https://www.baeldung.com/java-body-mass-index-calculator)
+- [Java Program to Calculate the Standard Deviation](https://www.baeldung.com/java-calculate-standard-deviation)
 - More articles: [[<-- Prev]](/core-java-modules/core-java-lang-math-2)

persistence-modules/java-mongodb-3/README.md

@@ -3,3 +3,4 @@
 - [Guide to Find in MongoDB](https://www.baeldung.com/mongodb-find)
 - [Query Documents using Document ID in MongoDB](https://www.baeldung.com/mongodb-query-documents-id)
 - [Insert Array Inside an Object in MongoDB](https://www.baeldung.com/java-mongodb-document-insert-array)
+- [Guide to Filters in MongoDB](https://www.baeldung.com/java-mongodb-filters)

persistence-modules/spring-boot-persistence-mongodb-3/README.md

@@ -1,3 +1,3 @@
 # Relevant Articles
-
+- [How to Insert a HashMap Into MongoDB With Java?](https://www.baeldung.com/java-mongodb-insert-hashmap)
 - More articles: [[<--prev]](../spring-boot-persistence-mongodb-2)

persistence-modules/spring-data-mongodb-2/README.md

@@ -5,4 +5,4 @@
 ### Relevant Articles: 
 - [Return Only Specific Fields for a Query in Spring Data MongoDB](https://www.baeldung.com/mongodb-return-specific-fields)
 - [UUID as Entity ID in MongoDB](https://www.baeldung.com/java-mongodb-uuid)
-
+- [Generate Unique ObjectId in MongoDB](https://www.baeldung.com/mongo-generate-unique-objectid)

spring-boot-modules/spring-boot-camel/README.md

@@ -27,3 +27,4 @@ or return code of 201 and the response: `{"id": 10,"name": "Hello, World"}` - if
 - [Apache Camel with Spring Boot](https://www.baeldung.com/apache-camel-spring-boot)
 - [Apache Camel Routes Testing in Spring Boot](https://www.baeldung.com/spring-boot-apache-camel-routes-testing)
 - [Apache Camel Conditional Routing](https://www.baeldung.com/spring-apache-camel-conditional-routing)
+- [Apache Camel Exception Handling](https://www.baeldung.com/java-apache-camel-exception-handling)

testing-modules/junit-5-advanced/README.md

@@ -6,3 +6,4 @@
 - [@TestInstance Annotation in JUnit 5](https://www.baeldung.com/junit-testinstance-annotation)
 - [Run JUnit Test Cases From the Command Line](https://www.baeldung.com/junit-run-from-command-line)
 - [Parallel Test Execution for JUnit 5](https://www.baeldung.com/junit-5-parallel-tests)
+- [JUnit – Testing Methods That Call System.exit()](https://www.baeldung.com/junit-system-exit)

testing-modules/mockito-2/README.md

@@ -3,3 +3,4 @@
 This module contains articles about Mockito
 
 ### Relevant Articles:
+- [Mocking a Singleton With Mockito](https://www.baeldung.com/java-mockito-singleton)

testing-modules/selenium-junit-testng/README.md

@@ -6,3 +6,4 @@
 - [Clicking Elements in Selenium using JavaScript](https://www.baeldung.com/java-selenium-javascript)
 - [Taking Screenshots With Selenium WebDriver](https://www.baeldung.com/java-selenium-screenshots)
 - [Running Selenium Scripts with JMeter](https://www.baeldung.com/selenium-jmeter)
+- [Fixing Selenium WebDriver Executable Path Error](https://www.baeldung.com/java-selenium-webdriver-path-error)