Object Calisthenics is an exercise proposed by Jeff Bay in the book The Thoughtworks Anthology, that outlines a set of nine rules to be used to write a new object-oriented project, with around 1000 lines of code, to help us design a piece of software that really implements encapsulation well.
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For years I have been managing my JDK all by myself, for instance, you’ll find a good amount of tutorials in this blog on how to install Java or making a portable JDK for making it easier to switch versions. It works quite well but we no longer need to do any of that manually, we can use SDKMAN!.
Read More »Don’t install Java by yourself anymore, use SDKMAN! insteadHere follows a short list of some IntelliJ IDEA useful shortcuts and tips to improve your productivity whilst coding Java.
Type Alt + Insert to open the code generation dropbox, then type:
Enter directly, then Up and Ctrl + Enter for no-arg constructor.Enter directly, then Ctrl + A to select all of the arguments.This tutorial is going to show you how to set up a Play Framework 2.6 project on Eclipse IDE.
This tutorial is going to show you how to create a Play Java project using the command line build tool SBT in simple steps.
First, create a workspace in order to keep things organised:
mkdir play-workspace cd play-workspaceRead More »Create Play Java Project
This tutorial is going to show you how to install Play Framework 2.6 on Ubuntu distributions by using the SBT package manager.
This tutorial will show how to install Spring Tool Suite on Eclipse and also the option to download and run the stand-alone version of the suite.
The Spring Tool Suite (STS) is an Eclipse based toolbox for Spring development, containing features such as a Boot Dashboard, support to the whole Spring ecosystem and native integration with Maven, Gradle and Git.
There are two types of exceptions in EJB: application exception and system exception. This guide will show how to identify and implement both of them.
In EJB, it’s important to know whether an exception has occurred because of a business problem or a system error. That way, EJB exceptions are split in two to represent a maybe recoverable business problem (like an ordinary checked exception in Java) or a unexpected and unrecoverable issue caused by a system error or bad coding (like common runtime exceptions).
After all the concepts involved, they are just ordinary exceptions with meaningful metadata defined by annotations or XML configuration in the deployment descriptor to tell the EJB container how to deal with them.
Read More »EJB: Application Exception vs System Exception
This tutorial will show how to install Java 9 on CentOS/RHEL and set up the necessary environment variables for application development.
This tutorial will show how to install Java 9 on Ubuntu and validate the setup to make sure the necessary environment variables for development are set.