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The three greatest paragraphs ever written on encapsulation

Definition. Encapsulation isn’t sexy. It’s the chartered accounting of software design. Functional Java programming? Formula freakin’ one. Hybrid cloud computing? ...
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Java API for JSON Processing (JSR-353) – Stream APIs

Java will soon have a standard set of APIs for processing JSON as part of Java EE 7. This standard is being defined as JSR 353 – Java API for JSON Processing (JSON-P) and it is ...
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Inadvertent Recursion Protection with Java ThreadLocals

Now here’s a little trick for those of you hacking around with third-party tools, trying to extend them without fully understanding them (yet!). Assume the following situation:You ...
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JUnit: Naming Individual Test Cases in a Parameterized Test

A couple of years ago I wrote about JUnit Parameterized Tests. One of the things I didn’t like about them was that JUnit named the invidividual test cases using numbers, so if ...
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War Games, Pair Testing and Other Fun Ways to Find Bugs

I’ve already examined how important good testing is to the health of a project, a product and an organization. There’s a lot more to good testing than running an automated test ...
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Score DRL: faster and easier in OptaPlanner

For OptaPlanner (= Drools Planner) 6.0.0.Beta1, I ‘ve replaced the ConstraintOccurrence with the much more elegant ConstraintMatch system. The result is that your score DRL files ...
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Java EE CDI bean scopes

Contexts and Dependency Injection (CDI) for the Java EE platform is a feature that helps to bind together the web tier and the transactional tier of the Java EE platform. CDI is a set ...
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Spring MVC Session Tutorial

Session management is one of essential parts for each web application. Since Spring MVC is a powerfull framework for a web development, it has own tools and API for the interaction ...
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JPA – Hibernate – Type mapping on package level

When we are finally mature enough to use some custom types mapping in JPA, we usually stuck with some provider specific solution, because JPA itself doesn’t define any mechanism ...
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Detecting Java Threads in Deadlock with Groovy and JMX

Unfortunately, Java applications taking advantage of multiple threads can at times run into the dreaded deadlock condition. Fortunately, the Java Platform makes deadlock detection relatively ...
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