Core Java
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Implementing an annotation interface
Using annotation is every day task for a Java developer. If nothing else simple @Override annotation should ring the bell.…
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Printing arrays by hacking the JVM
Overview One the most common gotchas in Java, is knowing how to print arrays. If an answer on how to…
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JUnit 5 – Basics
Last week we’ve set up JUnit 5 to be able to write tests. So let’s do it! Overview This post…
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Java compile in Java
In a previous post I wrote about how to generate a proxy during run-time and we got as far as…
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Java A’s new Local-Variable Type Inference
News could hardly get more exciting than this, for a programming language aficionado! There is now a JEP 286 for…
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Lambda of Lambda, if/else from an Optional
So I got frustrated with two limitations of the Optional interface in JDK 8. The first problem is that there…
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@Autowired and optional dependencies
@Autowired annotation makes our lives easier. It also can result in decreased amount of code if we are using it…
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Grouping, transforming and reduction with Java 8
1. Introduction In this previous post, I wrote about how we can group collections of objects with streams and grouping.…
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Equality vs Identity?
When storing objects in a Set, it is important that the same object can never be added twice. That is…
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