Core Java
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Walking Recursive Data Structures Using Java 8 Streams
The Streams API is a real gem in Java 8, and I keep finding more or less unexpected uses for…
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The Java Legacy is Constantly Growing
I’ve recently stumbled upon a very interesting caveat of the JDK APIs, the Class.getConstructors() method. Its method signature is this:…
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Mapreduce in Java8
Wordcount is to Mapreduce what “Hello world” is for rest of the programming world. Recently I have been exploring some…
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Avoid Recursion in ConcurrentHashMap.computeIfAbsent()
Sometimes we give terrible advice. Like in that article about how to use Java 8 for a cached, functional approach…
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How to Map Distinct Value Types Using Java Generics
Occasionally the average developer runs into a situation where he has to map values of arbitrary types within a particular…
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Create your own AOP in Java
Introduction As you know AOP is one of the best features provided by Spring framework which provides utmost flexibility while…
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Interface Evolution With Default Methods – Part I: Methods
A couple of weeks back we took a detailed look into default methods – a feature introduced in Java 8…
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Using Java 8 Lambda expressions in Java 7 or older
I think nobody declines the usefulness of Lambda expressions, introduced by Java 8. However, many projects are stuck with Java…
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Utility Classes Have Nothing to Do With Functional Programming
I was recently accused of being against functional programming because I call utility classes an anti-pattern. That’s absolutely wrong! Well,…
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