Merge pull request #14778 from edizor/master

Update README

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

@@ -12,4 +12,5 @@ This module contains articles about core Java input and output (IO)
 - [Getting a File’s Mime Type in Java](https://www.baeldung.com/java-file-mime-type)
 - [How to Avoid the Java FileNotFoundException When Loading Resources](https://www.baeldung.com/java-classpath-resource-cannot-be-opened)
 - [Java – Rename or Move a File](https://www.baeldung.com/java-how-to-rename-or-move-a-file)
+- [Closing Java IO Streams](https://www.baeldung.com/java-io-streams-closing)
 - [[More -->]](/core-java-modules/core-java-io-2)

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

@@ -3,4 +3,5 @@
 - [Convert Integer to Hexadecimal in Java](https://www.baeldung.com/java-convert-int-to-hex)
 - [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)
 - More articles: [[<-- prev]](../core-java-numbers-5)

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

@@ -5,3 +5,4 @@ This module contains articles about performance of Java applications
 ### Relevant Articles:
 - [External Debugging With JMXTerm](https://www.baeldung.com/java-jmxterm-external-debugging)
 - [Create and Detect Memory Leaks in Java](https://www.baeldung.com/java-create-detect-memory-leaks)
+- [Differences Between Heap Dump, Thread Dump and Core Dump](https://www.baeldung.com/java-heap-thread-core-dumps)

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

@@ -9,3 +9,4 @@
 - [Invoke a Static Method Using Java Reflection API](https://www.baeldung.com/java-invoke-static-method-reflection)
 - [What Is the JDK com.sun.proxy.$Proxy Class?](https://www.baeldung.com/jdk-com-sun-proxy)
 - [Unit Test Private Methods in Java](https://www.baeldung.com/java-unit-test-private-methods)
+- [Constructing Java Objects From Only the Class Name](https://www.baeldung.com/java-objects-make-using-class-name)

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

@@ -4,4 +4,5 @@ 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)
+- [Extract CN From X509 Certificate in Java](https://www.baeldung.com/java-extract-common-name-x509-certificate)
 - More articles: [[<-- prev]](/core-java-modules/core-java-security-3)

testing-modules/mockito-2/README.md

@@ -6,3 +6,4 @@ This module contains articles about Mockito
 - [Mocking a Singleton With Mockito](https://www.baeldung.com/java-mockito-singleton)
 - [Resolving Mockito Exception: Wanted But Not Invoked](https://www.baeldung.com/mockito-exception-wanted-but-not-invoked)
 - [Matching Null With Mockito](https://www.baeldung.com/mockito-match-null)
+- [Mock Same Method with Different Parameters](https://www.baeldung.com/java-mock-same-method-other-parameters)