If you have a few years of experience in the Java ecosystem and you'd like to share that with the community, have a look at our Contribution Guidelines.
Partner – JPA Buddy – NPI – expanded (tag = JPA)

The right tools can and will save a lot of time. As long as you are using Hibernate and IntelliJ IDEA you can boost your coding speed and quality with JPA Buddy. It will help in a lot of the day-to-day work:
- Creating JPA entities that follow best practices for efficient mapping
- Creating DTOs from entities and MapStruct mappers using convenient visual tools
- Generating entities from the existing database or Swagger-generated POJOs
- Visually composing methods for Spring Data JPA repositories
- Generating differential SQL to update your schema in accordance with your changes in entities
- Autogenerating Flyway migrations and Liquibase changelogs comparing entities with the database or two databases
- … and a lot more
Simply put, you'll learn and use the best practices of Hibernate and surrounding technology and become a lot more!
Definitely visit the JPA Buddy site to see its features in action closer.
Partner – MongoDB – NPI – expanded (tag = MongoDB)

You can explore MongoDB through their free forever cluster - Atlas.
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Get started with Spring 5 and Spring Boot 2, through the Learn Spring course:
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Java Concurrency Basics
- Overview of the java.util.concurrent
- Guide to the Synchronized Keyword in Java
- Guide to the Volatile Keyword in Java
- Guide to java.util.concurrent.Future
- An Introduction to ThreadLocal in Java
- Life Cycle of a Thread in Java
- How to Kill a Java Thread
- Introduction to Thread Pools in Java
- Implementing a Runnable vs Extending a Thread
- wait and notify() Methods in Java
- Runnable vs. Callable in Java
- Difference Between Wait and Sleep in Java
- The Thread.join() Method in Java
- Using a Mutex Object in Java
- ThreadPoolTaskExecutor corePoolSize vs. maxPoolSize
- Asynchronous Programming in Java

Advanced Concurrency in Java
- Daemon Threads in Java
- A Guide to the Java ExecutorService(popular)
- Guide to the Fork/Join Framework in Java
- Custom Thread Pools In Java 8 Parallel Streams
- Guide to CountDownLatch in Java
- Guide to java.util.concurrent.Locks
- ExecutorService – Waiting for Threads to Finish
- Guide To CompletableFuture(popular)
- CyclicBarrier in Java
- Guide to ThreadLocalRandom in Java
- Java CyclicBarrier vs CountDownLatch
- What is Thread-Safety and How to Achieve it?
- How to Delay Code Execution in Java
- How to Stop Execution After a Certain Time in Java

Other Concurrency Resources
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