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The Dark Side Of Lambda Expressions in Java 8

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This post may not make me any new friends. Oh well, I was never really popular at school anyway. But let’s get to the point. Java 8’s biggest feature in terms of the language is undoubtedly Lambda expressions. It’s been a flagship feature for functional languages such as Scala and Clojure for a few years, and now Java has finally joined ...

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The Builder pattern and the Spring framework

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Introduction I like to make use of the builder pattern whenever an object has both mandatory and optional properties. But building objects is usually the Spring framework responsibility, so let’s see how you can employ it using both Java and XML-based Spring configurations. A Builder example Let’s start from the following Builder class.   public final class Configuration<T extends DataSource> ...

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The Illuminating Javadoc of JDK 8

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One of the nice features of the standard JDK 8 API documentation is the ability to view all or different categories of methods as discussed in my blog post JDK 8 Javadoc Tweaked For Methods Listings. As convenient and useful as this categorization is, the text comments associated with many of the new classes and packages in JDK 8 are ...

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Are integration tests worth the hassle?

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Whether or not you write integration tests can be a religious argument: either you believe in them or you don’t. What we even mean by integration tests can lead to an endless semantic argument. What do you mean? Unit tests are easy to define they test a single unit: a single class, a single method, make a single assertion on the behaviour ...

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The economics of reuse

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If need the same functionality in two projects, you should reuse code between them, right? Or should you? For as long as there has been a profession of software engineering, we have tried to achieve more reuse. But reuse has both a benefit and a cost. Too often, the cost is forgotten. In this article, I examine the economics of ...

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Difference between WeakReference vs SoftReference vs PhantomReference vs Strong reference in Java

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WeakReference and SoftReference were added into Java API from long time but not every Java programmer is familiar with it. Which means there is a gap between where and how to use WeakReference and SoftReference in Java. Reference classes are particularly important in context of How Garbage collection works. As we all know that Garbage Collector reclaims memory from objects ...

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Good Vs Evil

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Posts about agile dying or becoming irrelevant come and go. God knows I’ve contributed to that movement. The latest wave started with Agile Manifesto signatory Dave Thomas, with “Agile is dead, long live Agility”. The discussion later continued on Twitter and the XP mailing list under the title “Taking agile back”. Taking it from whom? From the evil consultants who ...

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Default methods an approach to extend legacy code

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As you know the new version of java was released on 18 March 2014 and i am going to introduce a serial of posts to demonstrate its new features and maybe in some points i will talk about my ideas and criticism about them. The first feature which i think is important is “Default methods”, In all previous versions of ...

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