http://www.baeldung.com/java-runnable-callable
Runnable vs. Callable in Java
https://github.com/eugenp/tutorials/tree/master/core-java-concurrency - to add here

http://www.baeldung.com/spring-security-5-oauth2-login
Spring Security 5 – OAuth2 Login
https://github.com/eugenp/tutorials/tree/master/spring-5 - to add here

http://www.baeldung.com/maven-ignore-test-results
Build a Jar with Maven and Ignore the Test Results
https://github.com/eugenp/tutorials/tree/master/maven - to add here

http://www.baeldung.com/curl-rest
Test a REST API with curl
https://github.com/eugenp/tutorials/tree/master/spring-rest-simple - to add here

http://www.baeldung.com/jmapper
Guide to JMapper
https://github.com/eugenp/tutorials/tree/master/libraries-data - to add here

http://www.baeldung.com/kotlin-logging
Idiomatic Logging in Kotlin
https://github.com/eugenp/tutorials/tree/master/core-kotlin - to add here

http://www.baeldung.com/spring-rest-template-multipart-upload
Uploading MultipartFile with Spring RestTemplate
https://github.com/eugenp/tutorials/tree/master/spring-rest-template - to add here

http://www.baeldung.com/spring-rest-hal
Spring REST and HAL Browser
https://github.com/eugenp/tutorials/tree/master/spring-rest-hal-browser - to add here

http://www.baeldung.com/micronaut
Introduction to Micronaut Framework
https://github.com/eugenp/tutorials/tree/master/micronaut - to add here

http://www.baeldung.com/java-common-exceptions
Common Java Exceptions
https://github.com/eugenp/tutorials/tree/master/core-java - to add here

http://www.baeldung.com/java-instrumentation
Guide to Java Instrumentation
https://github.com/eugenp/tutorials/tree/master/core-java - to add here

http://www.baeldung.com/java-file-mime-type
Getting a File’s Mime Type in Java
https://github.com/eugenp/tutorials/tree/master/core-java - to add here

http://www.baeldung.com/spring-security-custom-authentication-failure-handler
Spring Security Custom AuthenticationFailureHandler
https://github.com/eugenp/tutorials/tree/master/spring-security-mvc-login - to add here

http://www.baeldung.com/java-copy-list-to-another
Copy a List to Another List in Java
https://github.com/eugenp/tutorials/tree/master/core-java-8 - to add here and
https://github.com/eugenp/tutorials/tree/master/core-java-10 - to add here

http://www.baeldung.com/java-increment-date
Increment Date in Java
https://github.com/eugenp/tutorials/tree/master/core-java-8 - to add here

http://www.baeldung.com/java-add-hours-date
Add Hours To a Date In Java
https://github.com/eugenp/tutorials/tree/master/core-java-8 - to add here

http://www.baeldung.com/java-override-system-time
Overriding System Time for Testing in Java
https://github.com/eugenp/tutorials/tree/master/core-java-8 - to add here

http://www.baeldung.com/embeddedservletcontainercustomizer-configurableembeddedservletcontainer-spring-boot
Container Configuration in Spring Boot 2
https://github.com/eugenp/tutorials/tree/master/spring-boot - to add here

http://www.baeldung.com/spring-webflux-errors
Handling Errors in Spring WebFlux
https://github.com/eugenp/tutorials/tree/master/spring-5-reactive - to add here

http://www.baeldung.com/spring-webflux
Guide to Spring 5 WebFlux
https://github.com/eugenp/tutorials/tree/master/spring-5-reactive - to add here

http://www.baeldung.com/spring-webflux-cors
Spring Webflux and CORS
https://github.com/eugenp/tutorials/tree/master/spring-5-reactive - to add here

http://www.baeldung.com/spring-session-jdbc
Spring Session with JDBC
https://github.com/eugenp/tutorials/tree/master/spring-session/spring-session-jdbc - to fix link from http://www.baeldung.com to http://www.baeldung.com/spring-session-jdbc
https://github.com/eugenp/tutorials/tree/master/spring-session - to fix link from http://www.baeldung.com to http://www.baeldung.com/spring-session-jdbc

http://www.baeldung.com/java-remove-first-element-from-list
Remove the First Element from a List
https://github.com/eugenp/tutorials/tree/master/core-java-collections - to add here

http://www.baeldung.com/java-list-to-map
How to Convert List to Map in Java
https://github.com/eugenp/tutorials/tree/master/core-java-collections - to add here

http://www.baeldung.com/java-initialize-hashset
Initializing HashSet at the Time of Construction
https://github.com/eugenp/tutorials/tree/master/core-java-collections - to add here

http://www.baeldung.com/spring-boot-vue-js
Vue.js Frontend with a Spring Boot Backend
https://github.com/eugenp/tutorials/tree/master/spring-boot-vue - to add here

http://www.baeldung.com/spring-primary
Spring @primary Annotation
https://github.com/eugenp/tutorials/tree/master/spring-all - to add here

http://www.baeldung.com/eclipse-jnosql
A Guide to Eclipse JNoSQL
https://github.com/eugenp/tutorials/tree/master/jnosql - to add here

http://www.baeldung.com/ejb-message-driven-beans
A Guide to Message Driven Beans in EJB
https://github.com/eugenp/tutorials/tree/master/ejb - to add here

http://www.baeldung.com/spring-batch-start-stop-job
How to Trigger and Stop a Scheduled Spring Batch Job
https://github.com/eugenp/tutorials/tree/master/spring-batch - to add here

http://www.baeldung.com/java-apache-avro
Guide to Apache Avro
https://github.com/eugenp/tutorials/tree/master/apache-avro - to add here

http://www.baeldung.com/spring-webflux-kotlin
Spring Webflux with Kotlin
https://github.com/eugenp/tutorials/tree/master/spring-reactive-kotlin - to add here