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Groovy Goodness: Closure as a Class

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When we write Groovy code there is a big chance we also write some closures. If we are working with collections for example and use the each, collect or find methods we use closures as arguments for these methods. We can assign closures to variables and use the variable name to reference to closure. But we can also create a ...

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Java 9 Behind the Scenes: Where Do New Features Come From?

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Find out what’s going on behind the scenes of Java, and how new features come to life In a previous post we went over the new and pending features for the upcoming Java 9 release, and briefly mentioned the process that a new feature goes through before being added to the next release. Since this process affects almost all Java developers, ...

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WAI-ARIA support for AutoComplete widget

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In this post I would like to discuss the accessibility for an AutoComplete widget. A typically AutoComplete widget provides suggestions while you type into the field. On my current work I implemented an JSF component on basis of Twitter’s Typeahead – a flexible JavaScript library that provides a strong foundation for building robust typeaheads. The Typeahead widget has a solid ...

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What Does a Software Architect Do?

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Do you have a software architect in your project? Do you need one? Well, most agile teams do not define such a role explicitly and work in a democratic mode. Every important technical decision is discussed with the entire team, and the most voted for solution wins. When such a team eventually decides to put a “software architect” badge on ...

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The Agile Tester, a curious and empathetic animal

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The agile tester (ˈadʒʌɪl/ ˈtɛstə/) is an mammal member of the family “Exploratoris”. He lives in the wild in small groups named cross-functional agile teams.           Skills Besides communication and technical skills, his main traits are curiosity and empathy [1]. Curiosity helps the agile tester in finding opportunities to improve the product. The agile tester questions ...

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Write in Ceylon, Deploy as OSGI, use in JEE

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… or how to use Ceylon inside Java EE application servers. The Ceylon language is inherently modular, and is shipped with a complete infrastructure that allows leveraging this modularity out-of-the box. However Ceylon is not captive of its own infrastructure. After the Java and JS interoperability efforts, the 1.1.0 version has brought out-of-the-box compatibility with OSGI, which enables running Ceylon ...

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New Custom Control: TaskProgressView

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I have written a new custom control and commited it to the ControlsFX project. It is a highly specialized control for showing a list of background tasks, their current status and progress. This is actually the first control I have written for ControlsFX just for the fun of it, meaning I do not have a use case for it myself ...

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JPA Tutorial: Mapping Entities – Part 3

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In my last article I showed two different ways to read/write persistent entity state – field and property. When field access mode is used, JPA directly reads the state values from the fields of an entity using reflection. It directly translates the field names into database column names if we do not specify the column names explicitly.  In case of property access mode, ...

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Java And The Sweet Science

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When you have been developing in Java for 15 years and a coworker asks you to help them debug a null pointer exception, you don’t expect to be surprised. Usually it is quite obvious what is null and the only thing you need to do is find out why. Sometimes it is a little more difficult because someone has created ...

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