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Mini Search Engine – Just the basics, using Neo4j, Crawler4j, Graphstream and Encog

Continuing to chapter 4 of Programming Collection Intelligence  (PCI) which is implementing a search engine. I may have bitten off a little more than I should of in 1 exercise. Instead ...
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Testing Java 8 in 3 Easy Steps

tl;dr Use your CI Setup to test Java 8. The upcoming Java 8 release promises a bunch of new feature for Java developers, but there’s always a risk when upgrading that your code ...
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How to use Reflection to Document your Data Model based on JPA Annotations

So using JPA, Hiber­nate or EBeans is cool when you can just anno­tate your Java classes, but haven’t you always wished you could “gen­er­ate” doc­u­men­ta­tion of your ...
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Messaging with RabbitMQ

We previously published a brief tutorial showing how to set up a Spring RabbitMQ Template. Now, let’s take a step back for a broader view of what RabbitMQ is and how you might use ...
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The Dangers of Correlating Subtype Polymorphism with Generic Polymorphism

Java 5 has introduced generic polymorphism to the Java ecosystem. This has been a great addition to the Java language, even if we’re all aware of the numerous caveats due to generic ...
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SQL to NoSQL : Copy your data from MySQL to Couchbase

Introduction During my last interactions with the Couchbase community, I had the question how can I easily import my data from my current database into Couchbase. And my answer was ...
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Java 7 Swing: Creating Translucent and Shaped Windows

Java 7 Swing supports windows with transparency and non-rectangular shapes. The following screenshot shows a circular window created with 75% opacity. You can create a translucent window ...
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Comparing JARs with Groovy

It can sometimes be useful to compare the contents of two JARs. In this blog post, I demonstrate a Groovy script that acts like a simple “diff” tool for comparing two JAR ...
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We Don’t Need That Documentation

“We must write more documentation”. Have you heard that? I have, many times in many companies. Most people feel guilty for not writing documentation and agree. I don’t. There ...
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Spring MVC Custom Validation Annotations

Last tutorial, I showed how to validate a form using annotations. This works great for simple validations, but eventually, you’ll need to validate some custom rules that aren’t ...
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