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Beyond POJOs – Ten More Ways to Reduce Boilerplate with Lombok

How to use Lombok to reduce Java boilerplate in logging, null checks, variable definitions, concurrent code, exception handling, laziness, and more.

Java’s Thread Class in Five Minutes

Threads are Java's basic abstraction for running code in parallel. Learn how to use the Thread class to launch, finish, and wait for threads.

In Praise of Laziness

Java is known as a strict language regarding references and method arguments. It's however possible (and very useful) to implement laziness in types.

Java Module System Hands-On Guide

Java’s Switch Statement in Three Minutes

Java's switch statement allows easy selection of execution paths based on a variable's value. Switches can replace if-else-if chains.

Using CDI/Weld to Inject JPA/Hibernate Entity Managers

A tutorial on how to use Contexts and Dependency Injection (CDI) / Weld and Hibernate in the development of a full-blown JPA application.

Declutter Your POJOs with Lombok

Lombok is a library that helps to reduce Java's verbosity. This tutorial presents how to use it to write clearer POJO classes.

Property Based Testing with Vavr

Learning property based testing, or property checking, in Java using Vavr (formerly Javaslang) and the FizzBuzz Kata.

Fixing Bugs in Running Java Code with Dynamic Attach

Using Java agents and the dynamic attach and instrumentation APIs it is possible to fix bugs in running Java programs.

10 Java Blogs to Follow in 2017

10 recommendations for Java blogs you should follow in 2017. All of them provide high-quality content that will improve your understanding of Java and the frameworks you use on a daily basis.

Introduction to Contexts and Dependency Injection (CDI)

A tutorial on how to use Contexts and Dependency Injection (CDI) and Weld in Java SE, covering core features like annotations, qualifiers, and producers.

Getting Started with Dropwizard – CRUD Operations

Dropwizard is a framework for building RESTful web services in Java. This tutorial shows how to create, retrieve, update, and delete resources.

Reflection vs Encapsulation – Stand Off in the Java Module System

Reflection wants to break into all code; encapsulation wants to give modules a safe space. How can this stand off in the Java module system be resolved?

Maybe I Was Wrong about Java – Part 2

A run-through of some common perceptions of Java, from someone who doesn't regularly work with it. Is it really that abstract and wordy?

Groovy, an Open Source Success Story

The history of the Groovy programming language including technical features and aspects of its governance and community that have made it successful.

Keeping The Community In The Java Community Process (JCP)

The Java Community Process (JCP) governs Java's future. Simon Ritter explains it and how the EC, EGs, JSRs, JEPs, the JSPA, FoU, RI, and TCK/JCK interact.

Maybe I Was Wrong about Java – Part 1

A run-through of some common perceptions of Java, from someone who doesn't regularly work with it. Is it really that slow and bloated?

What Future Java Might Look Like

Java's future is full of cool advances: data classes, value types, generics over primitives, pattern matching, etc. Let's peek into Java's future!

Generational Disparity in Garbage Collection

A case study of how separate processes sharing the same Java Virtual Machine can impact garbage collection and thus each other.

Inside Java 9 – Performance, Compiler, and More

Java 9 has a lot to offer besides modularity: new language features and a lot of new or improved APIs, GNU-style command options, multi-release JARs, improved logging, and more.

Inside Java 9 – Version Schema, Multi-Release JARs, and More

Java 9 brings more than just modules: multi-release JARs, UTF-8 property files, Unicode 8.0, reserved stack space ... a lot goes on inside Java 9.

Effective Domain Model Validation with Hibernate Validator

A hands-on guide to domain model validation with the Java Beans Validation standard (JSR 303) and Hibernate Validator (Apache BVal is very similar.)

Combining Spring Boot and JDBI

Explains how to use Spring Boot with JDBI instead of Hibernate, resulting first-class dependency injection (by Spring Boot) and a light ORM (JDBI).

JUnit 5 State Of The Union

Summarizing where JUnit 5 is currently standing, discussing everything from API, extension model, and architecture to history, tool support, and open issues

Getting Started with Dropwizard

Dropwizard is a framework for building RESTful web services in Java. In this tutorial we're going to create a new Dropwizard service from scratch.

Building a Web App with Java Servlets

This tutorial builds a simple Java web application with Java's Servlet API. It shows how to set the project up, create views / controllers, and deploy.

JavaOne 2016 – Nucleus

A summary of the best JavaOne 2016 talks that discussed Java 8, Java 9 and Project Jigsaw, as well as Java EE 8.

Schema Migration with Hibernate and FlywayDB

Exploring the limitations of Hibernate's schema generation utility hbm2ddl and the benefits of an automated schema migration tool such as FlywayDB.

How Optional Breaks the Monad Laws and Why It Matters

Java's Optional, unlike may-or-may-not-contain-a-value types in other languages, is no well-behaving monad. And this matters to everyday developers like us!

Combinator Pattern with Java 8

The Combinator Pattern, well known in FP, combines primitives into complex structures. Gregor Trefs explores an implementation in Java 8.