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Have a look through a collection of focused series on various Java development topics.
Learn to use JUnit to the full extent of its capabilities. >>>
Learn Spring Boot, from the core concepts to the advanced scenarios you can implement with the framework. >>>
Learn all about OAuth with Spring Security. >>>
Learn all about working with Strings in Java. >>>
Learn about and explore the full IO capabilities in Java. >>>
Explore Concurrency in Java. >>>
The Full Guide to Java Streams. >>>
Learn all about Java Collections. >>>
RxJava is a Reactive Extensions implementation for Java environment. >>>
Vavr is a functional library for Java 8+ that provides immutable data types and functional control structures. >>>
A quick guide to all the Spring Data articles here on Baeldung. >>>
This is a guide to Spring Data MongoDB – from a quick intro on how to hit the ground running in a Spring project, to queries and more complex features. >>>
A case study on building a small application to schedule Posts to the Reddit API using Spring. >>>
Learn Jackson 2 inside out – the marshalling and the unmarshalling from basic mapping to advanced techniques and exceptions. >>>
Comprehensive Guide to the Apache HttpClient – start with basic usage and make your way though the advanced scenarios. >>>