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JUnit Tutorial for Unit Testing – The ULTIMATE Guide (PDF Download)

EDITORIAL NOTE: We have provided plenty of JUnit tutorials here at Java Code Geeks, like JUnit Getting Started Example, JUnit Using Assertions and Annotations Example, JUnit Annotations ...
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10 Things You Didn’t Know About Java

So, you’ve been working with Java since the very beginning? Remember the days when it was called “Oak”, when OO was still a hot topic, when C++ folks thought that Java had no ...
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Java EE 7 / JAX-RS 2.0 – CORS on REST

Java EE REST application usually works well out of the box on a development machine where all server side resources and client side UIs point to “localhost” or 127.0.0.1. But when ...
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Beginner’s Guide to Hazelcast Part 3

This is a continuation of a series of posts on how to use Hazelcast from a beginner’s point of view.  If you haven’t read the last two, I encourage reading them: Beginner’s Guide ...
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Create WildFly OpenShift application using Command Line Tools

A new instance of WildFly can be easily provisioned on OpenShift by using the quick start. Just a single click, and you are ready to go! Generally power users of OpenShift use Command ...
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Spring boot based websocket application and capturing http session id

I was involved in a project recently where we needed to capture the http session id for a websocket request – the reason was to determine the number of websocket sessions utilizing ...
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Efficient Creation of Eclipse Modules with Maven Archetype

Maven Archetype is a project templating toolkit that provides developers with the means to generate parameterized versions of built-in or custom scaffolding artefacts. Recently I applied ...
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When null checking miserably fails

Disclaimer Before going on I have to state that the techniques described in this article serve no practical purpose when we program Java. It is like a crossword or puzzle. It main train ...
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On Java Generics and Erasure

“Generics are erased during compilation” is common knowledge (well, type parameters and arguments are actually the ones erased). That happens due to “type erasure”. But it’s ...
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Java 8 Streams: Micro Katas

A programming kata is an exercise which helps a programmer hone his skills through practice and repetition. This article is part of the series Java Tutorial Through Katas. The article ...
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