Merge pull request #14879 from edizor/master

Update README

core-java-modules/core-java-16/README.md

@@ -5,3 +5,4 @@
 - [Collecting Stream Elements into a List in Java](https://www.baeldung.com/java-stream-to-list-collecting)
 - [New Features in Java 16](https://www.baeldung.com/java-16-new-features)
 - [Guide to Java 8 groupingBy Collector](https://www.baeldung.com/java-groupingby-collector)
+- [Value-Based Classes in Java](https://www.baeldung.com/java-value-based-classes)

core-java-modules/core-java-21/README.md

@@ -1,2 +1,3 @@
 ## Relevant Articles
-- [Sequenced Collections in Java 21](https://www.baeldung.com/java-21-sequenced-collections)
+- [Sequenced Collections in Java 21](https://www.baeldung.com/java-21-sequenced-collections)
+- [String Templates in Java 21](https://www.baeldung.com/java-21-string-templates)

core-java-modules/core-java-9-streams/README.md

@@ -4,3 +4,4 @@ This module contains articles about Java 9 streams
 
 ### Relevant Articles: 
 - [How to Break from Java Stream forEach](https://www.baeldung.com/java-break-stream-foreach)
+- [Creating Stream of Regex Matches](https://www.baeldung.com/java-stream-regex-matches)

core-java-modules/core-java-arrays-guides/README.md

@@ -9,3 +9,4 @@ This module contains complete guides about arrays in Java
 - [Guide to ArrayStoreException](https://www.baeldung.com/java-arraystoreexception)
 - [Creating a Generic Array in Java](https://www.baeldung.com/java-generic-array)
 - [Maximum Size of Java Arrays](https://www.baeldung.com/java-arrays-max-size)
+- [Merge Two Arrays and Remove Duplicates in Java](https://www.baeldung.com/java-merge-two-arrays-delete-duplicates)

core-java-modules/core-java-arrays-operations-advanced-2/README.md

@@ -0,0 +1,2 @@
+## Relevant Articles
+- [Find the Middle Element of an Array in Java](https://www.baeldung.com/java-array-middle-item)

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

@@ -14,4 +14,3 @@ This module contains articles about advanced operations on arrays in Java. They
 - [Slicing Arrays in Java](https://www.baeldung.com/java-slicing-arrays)
 - [Combining Two or More Byte Arrays](https://www.baeldung.com/java-concatenate-byte-arrays)
 - [Calculating the Sum of Two Arrays in Java](https://www.baeldung.com/java-sum-arrays-element-wise)
-- [Find the Middle Element of an Array in Java](https://www.baeldung.com/java-array-middle-item)

core-java-modules/core-java-collections-list-6/README.md

@@ -0,0 +1,2 @@
+## Relevant Articles
+- [Check if a List Contains a String Element While Ignoring Case](https://www.baeldung.com/java-list-search-case-insensitive)

core-java-modules/core-java-documentation/README.md

@@ -3,4 +3,4 @@
 ### Relevant Articles: 
 
 - [Introduction to Javadoc](http://www.baeldung.com/javadoc)
-
+- [Code Snippets in Java API Documentation](https://www.baeldung.com/java-doc-code-snippets)

core-java-modules/core-java-io-apis-2/README.md

@@ -7,3 +7,4 @@ This module contains articles about core Java input/output(IO) APIs.
 - [Get the Desktop Path in Java](https://www.baeldung.com/java-desktop-path)
 - [Check if a File Is Empty in Java](https://www.baeldung.com/java-check-file-empty)
 - [Converting Relative to Absolute Paths in Java](https://www.baeldung.com/java-from-relative-to-absolute-paths)
+- [Detect EOF in Java](https://www.baeldung.com/java-file-detect-end-of-file)

core-java-modules/core-java-numbers-6/README.md

@@ -4,4 +4,5 @@
 - [Integer.class vs Integer.TYPE vs int.class](https://www.baeldung.com/java-integer-class-vs-type-vs-int)
 - [Does Java Read Integers in Little Endian or Big Endian?](https://www.baeldung.com/java-integers-little-big-endian)
 - [How to Split an Integer Number Into Digits in Java](https://www.baeldung.com/java-integer-individual-digits)
+- [Java Double vs. BigDecimal](https://www.baeldung.com/java-double-vs-bigdecimal)
 - More articles: [[<-- prev]](../core-java-numbers-5)

core-java-modules/core-java-string-algorithms-3/README.md

@@ -11,4 +11,5 @@ This module contains articles about string-related algorithms.
 - [Find the First Non Repeating Character in a String in Java](https://www.baeldung.com/java-find-the-first-non-repeating-character)
 - [Find the First Embedded Occurrence of an Integer in a Java String](https://www.baeldung.com/java-string-find-embedded-integer)
 - [Find the Most Frequent Characters in a String](https://www.baeldung.com/java-string-find-most-frequent-characters)
-- [Checking If a String Is a Repeated Substring](https://www.baeldung.com/java-repeated-substring)
+- [Checking If a String Is a Repeated Substring](https://www.baeldung.com/java-repeated-substring)
+- [Check if Letter Is Emoji With Java](https://www.baeldung.com/java-check-letter-emoji)