Merge pull request #14691 from edizor/master

Update README

core-java-modules/core-java-17/README.md

@@ -7,3 +7,4 @@
 - [Random Number Generators in Java 17](https://www.baeldung.com/java-17-random-number-generators)
 - [Sealed Classes and Interfaces in Java](https://www.baeldung.com/java-sealed-classes-interfaces)
 - [Migrate From Java 8 to Java 17](https://www.baeldung.com/java-migrate-8-to-17)
+- [Format Multiple ‘or’ Conditions in an If Statement in Java](https://www.baeldung.com/java-multiple-or-conditions-if-statement)

core-java-modules/core-java-collections-set-2/README.md

@@ -4,4 +4,5 @@
 - [A Guide to LinkedHashSet in Java](https://www.baeldung.com/java-linkedhashset)
 - [Sorting a HashSet in Java](https://www.baeldung.com/java-sort-hashset)
 - [How to Get First Item From a Java Set](https://www.baeldung.com/first-item-set)
+- [Cartesian Product of Any Number of Sets in Java](https://www.baeldung.com/java-cartesian-product-sets)
 - More articles: [[<-- prev]](/core-java-modules/core-java-collections-set)

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

@@ -6,3 +6,4 @@ This module contains articles about core features in the Java language
 
 - [Convert One Enum to Another Enum in Java](https://www.baeldung.com/java-convert-enums)
 - [What Is the Maximum Depth of the Java Call Stack?](https://www.baeldung.com/java-call-stack-max-depth)
+- [Get a Random Element From a Set in Java](https://www.baeldung.com/java-set-draw-sample)

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

@@ -7,4 +7,6 @@
 - [Creating a Java Array from Regular Expression Matches](https://www.baeldung.com/java-array-regex-matches)
 - [Getting the Text That Follows After the Regex Match in Java](https://www.baeldung.com/java-regex-text-after-match)
 - [Regular Expression: \z vs \Z Anchors in Java](https://www.baeldung.com/java-regular-expression-z-vs-z-anchors)
+- [Extract Text Between Square Brackets](https://www.baeldung.com/java-get-content-between-square-brackets)
+- [Get the Indexes of Regex Pattern Matches in Java](https://www.baeldung.com/java-indexes-regex-pattern-matches)
 - More articles: [[<-- prev]](/core-java-modules/core-java-regex)

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

@@ -3,5 +3,5 @@
 This module contains articles about core Java Security
 
 ### Relevant Articles:
-
+- [Check if Certificate Is Self-Signed or CA-Signed With Java](https://www.baeldung.com/java-check-certificate-sign)
 - More articles: [[<-- prev]](/core-java-modules/core-java-security-3)