Indrek Ots, Dec 12
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.
Nicolai Parlog, Dec 05
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?
Eevee, Dec 01
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?
Paul King, Nov 24
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.
Simon Ritter, Nov 21
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.
Eevee, Nov 17
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?
Nicolai Parlog, Nov 14
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!
Rafael Winterhalter, Nov 10
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.
Nicolai Parlog, Nov 07
Inside Java 9 - Performance, Compiler, and More
Java 9 brings more than just modules: better performance, less momory consumption, G1 as the default GC, HTML5 Javadoc ... a lot goes on inside Java 9.
Nicolai Parlog, Nov 02
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.
Alejandro Gervasio, Oct 27
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.)
Damian Hagge, Oct 25
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).
Nicolai Parlog, Oct 20
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
Indrek Ots, Oct 13
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.
Alejandro Gervasio, Oct 10
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.
Nicolai Parlog, Oct 06
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.
Vlad Mihalcea, Oct 03
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.
Marcello La Rocca, Sep 29
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!
Gregor Trefs, Sep 25
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.
Alejandro Gervasio, Sep 22
A Hibernate Introduction - Persisting Java Objects the Easy Way
JPA/Hibernate is a common approach to persistence in Java. This tutorial creates a simple CRUD app using Hibernate's EntityManager and the DAO pattern.
Thorben Janssen, Sep 15
5 Reasons to Use JPA / Hibernate
JPA is a Java specification for object-relational mapping and Hibernate its most popular implementation. Here are five reasons to use them for persistence.
Nicolai Parlog, Sep 04
The Ultimate Guide to Java 9
Java 9 is coming! Besides Jigsaw it brings new language features and many new and improved APIs. This is the ultimate guide to all that's new in Java 9.
Bozhidar Bozhanov, Sep 01
Why I Introduced Scala In Our Project
I don’t like Scala and I think it is a poor choice for mainstream development. But recently I still introduced it in our project and here's why.
Indrek Ots, Aug 25
Java, Unicode, and the Mysterious Compile Error
Indrek Ots explains how the Java compiler handles Unicode and Unicode escapes and how this can lead to mysterious compile errors.