Merge pull request eugenp#6068 from collaboratewithakash/master

back-link added

Author: lor6

akka-http/README.md

@@ -0,0 +1,3 @@
+## Relevant articles:
+
+- [Introduction to Akka HTTP](https://www.baeldung.com/akka-http)

algorithms-miscellaneous-1/README.md

@@ -12,4 +12,5 @@
 - [Check If a String Contains All The Letters of The Alphabet](https://www.baeldung.com/java-string-contains-all-letters)
 - [Find the Middle Element of a Linked List](http://www.baeldung.com/java-linked-list-middle-element)
 - [Calculate Factorial in Java](https://www.baeldung.com/java-calculate-factorial)
-- [Find Substrings That Are Palindromes in Java](https://www.baeldung.com/java-palindrome-substrings)
+- [Find Substrings That Are Palindromes in Java](https://www.baeldung.com/java-palindrome-substrings)
+- [Find the Longest Substring without Repeating Characters](https://www.baeldung.com/java-longest-substring-without-repeated-characters)

core-java-11/README.md

@@ -2,4 +2,4 @@
 
 - [Java 11 Single File Source Code](https://www.baeldung.com/java-single-file-source-code)
 - [Java 11 Local Variable Syntax for Lambda Parameters](https://www.baeldung.com/java-var-lambda-params)
-
+- [Java 11 String API Additions](https://www.baeldung.com/java-11-string-api)

core-java-arrays/README.md

@@ -13,3 +13,4 @@
 - [How to Invert an Array in Java](http://www.baeldung.com/java-invert-array)
 - [Array Operations in Java](http://www.baeldung.com/java-common-array-operations)
 - [Intersection Between two Integer Arrays](https://www.baeldung.com/java-array-intersection)
+- [Sorting Arrays in Java](https://www.baeldung.com/java-sorting-arrays)

core-java-collections/README.md

@@ -30,3 +30,4 @@
 - [Join and Split Arrays and Collections in Java](http://www.baeldung.com/java-join-and-split)
 - [A Guide to EnumMap](https://www.baeldung.com/java-enum-map)
 - [A Guide to Iterator in Java](http://www.baeldung.com/java-iterator)
+- [Differences Between HashMap and Hashtable](https://www.baeldung.com/hashmap-hashtable-differences)

core-java/README.md

@@ -45,3 +45,4 @@
 - [Guide to Character Encoding](https://www.baeldung.com/java-char-encoding)
 - [Graphs in Java](https://www.baeldung.com/java-graphs)
 - [Console I/O in Java](http://www.baeldung.com/java-console-input-output)
+- [Formatting with printf() in Java](https://www.baeldung.com/java-printstream-printf)

core-kotlin/README.md

@@ -47,3 +47,7 @@
 - [Dependency Injection for Kotlin with Injekt](https://www.baeldung.com/kotlin-dependency-injection-with-injekt)
 - [Implementing a Binary Tree in Kotlin](https://www.baeldung.com/kotlin-binary-tree)
 - [Generate a Random Alphanumeric String in Kotlin](https://www.baeldung.com/kotlin-random-alphanumeric-string)
+- [Kotlin Contracts](https://www.baeldung.com/kotlin-contracts)
+- [Operator Overloading in Kotlin](https://www.baeldung.com/kotlin-operator-overloading)
+- [Inline Classes in Kotlin](https://www.baeldung.com/kotlin-inline-classes)
+- [Creating Java static final Equivalents in Kotlin](https://www.baeldung.com/kotlin-java-static-final)

gson/README.md

@@ -9,3 +9,4 @@
 - [Exclude Fields from Serialization in Gson](http://www.baeldung.com/gson-exclude-fields-serialization)
 - [Save Data to a JSON File with Gson](https://www.baeldung.com/gson-save-file)
 - [Convert JSON to a Map Using Gson](https://www.baeldung.com/gson-json-to-map)
+- [Working with Primitive Values in Gson](https://www.baeldung.com/java-gson-primitives)

java-collections-maps/README.md

@@ -18,3 +18,4 @@
 - [Merging Two Maps with Java 8](https://www.baeldung.com/java-merge-maps)
 - [How to Check If a Key Exists in a Map](https://www.baeldung.com/java-map-key-exists)
 - [Comparing Two HashMaps in Java](https://www.baeldung.com/java-compare-hashmaps)
+- [Immutable Map Implementations in Java](https://www.baeldung.com/java-immutable-maps) 

java-streams/README.md

@@ -14,3 +14,4 @@
 - [Primitive Type Streams in Java 8](http://www.baeldung.com/java-8-primitive-streams)
 - [Stream Ordering in Java](https://www.baeldung.com/java-stream-ordering)
 - [Introduction to Protonpack](https://www.baeldung.com/java-protonpack)
+- [Java Stream Filter with Lambda Expression](https://www.baeldung.com/java-stream-filter-lambda)

java-strings/README.md

@@ -46,4 +46,6 @@
 - [Replace a Character at a Specific Index in a String in Java](https://www.baeldung.com/java-replace-character-at-index)
 - [Convert a Comma Separated String to a List in Java](https://www.baeldung.com/java-string-with-separator-to-list)
 - [Guide to java.util.Formatter](http://www.baeldung.com/java-string-formatter)
-- [Add a Character to a String at a Given Position](https://www.baeldung.com/java-add-character-to-string)
+- [Add a Character to a String at a Given Position](https://www.baeldung.com/java-add-character-to-string)
+- [Remove Leading and Trailing Characters from a String](https://www.baeldung.com/java-remove-trailing-characters)
+- [Concatenating Strings In Java](https://www.baeldung.com/java-strings-concatenation)

jee-7/README.md

@@ -5,3 +5,4 @@
 - [Introduction to JAX-WS](http://www.baeldung.com/jax-ws)
 - [A Guide to Java EE Web-Related Annotations](http://www.baeldung.com/javaee-web-annotations)
 - [Introduction to Testing with Arquillian](http://www.baeldung.com/arquillian)
+- [Java EE 7 Batch Processing](https://www.baeldung.com/java-ee-7-batch-processing)

lombok-custom/README.md

@@ -0,0 +1,3 @@
+## Relevant articles:
+
+- [Implementing a Custom Lombok Annotation](https://www.baeldung.com/lombok-custom-annotation)

persistence-modules/hibernate5/README.md

@@ -24,3 +24,8 @@
 - [Hibernate 5 Bootstrapping API](https://www.baeldung.com/hibernate-5-bootstrapping-api)
 - [Criteria Queries Using JPA Metamodel](https://www.baeldung.com/hibernate-criteria-queries-metamodel)
 - [Guide to the Hibernate EntityManager](https://www.baeldung.com/hibernate-entitymanager)
+- [Get All Data from a Table with Hibernate](https://www.baeldung.com/hibernate-select-all)
+- [One-to-One Relationship in JPA](https://www.baeldung.com/jpa-one-to-one)
+- [Hibernate Named Query](https://www.baeldung.com/hibernate-named-query)
+- [Using c3p0 with Hibernate](https://www.baeldung.com/hibernate-c3p0)
+- [Persist a JSON Object Using Hibernate](https://www.baeldung.com/hibernate-persist-json-object)

persistence-modules/spring-data-jpa/README.md

@@ -18,6 +18,7 @@
 - [Limiting Query Results with JPA and Spring Data JPA](https://www.baeldung.com/jpa-limit-query-results)
 - [Sorting Query Results with Spring Data](https://www.baeldung.com/spring-data-sorting)
 - [INSERT Statement in JPA](https://www.baeldung.com/jpa-insert)
+- [Pagination and Sorting using Spring Data JPA](https://www.baeldung.com/spring-data-jpa-pagination-sorting)
 
 ### Eclipse Config 
 After importing the project into Eclipse, you may see the following error:  

spring-5-reactive/README.md

@@ -18,3 +18,4 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
 - [Validation for Functional Endpoints in Spring 5](https://www.baeldung.com/spring-functional-endpoints-validation)
 - [Logging a Reactive Sequence](https://www.baeldung.com/spring-reactive-sequence-logging)
 - [Testing Reactive Streams Using StepVerifier and TestPublisher](https://www.baeldung.com/reactive-streams-step-verifier-test-publisher)
+- [Debugging Reactive Streams in Spring 5](https://www.baeldung.com/spring-debugging-reactive-streams)

spring-boot-ops/README.md

@@ -9,4 +9,4 @@
  - [Shutdown a Spring Boot Application](http://www.baeldung.com/spring-boot-shutdown)
  - [Spring Boot Console Application](http://www.baeldung.com/spring-boot-console-app)
  - [Comparing Embedded Servlet Containers in Spring Boot](http://www.baeldung.com/spring-boot-servlet-containers)
- 
+ - [Programmatically Restarting a Spring Boot Application](https://www.baeldung.com/java-restart-spring-boot-app)

spring-cloud/spring-cloud-kubernetes/README.md

@@ -1,3 +1,4 @@
 ### Relevant Articles:
 
 - [Running Spring Boot Applications With Minikube](https://www.baeldung.com/spring-boot-minikube)
+- [Self-Healing Applications with Kubernetes and Spring Boot](https://www.baeldung.com/spring-boot-kubernetes-self-healing-apps)