Core Java
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Java Hidden code
Sometime ago I came across the issue of invisible characters in Strings. These can really cause confusion because they are…
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Duck typing in Java ? Well, not exactly
According to Wikipedia duck typing is: style of dynamic typing in which an object’s methods and properties determine the valid…
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Building OpenJDK on Windows
Doing some experiments, I found that it often useful to have JDK source code available in hand to make some…
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Java Annotations – Retention
Consider a Java annotation: public @interface AnAnnotaton { } A class with this annotation applied on it: @AnAnnotaton class AnAnnotatedClass{…
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A Generic and Concurrent Object Pool
In this post we will take a look at how we can create an object pool in Java. In recent…
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Java: Choosing the right Collection
Here is a quick guide for selecting the proper implementation of a Set , List , or Map in your application. The best general purpose or…
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Common code violations in Java
At work, recently I did a code cleanup of an existing Java project. After that exercise, I could see a…
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Java Memory Profiling Simplified
As a typical Java developer I never monitored the memory usage of my application apart from following typical best practices…
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Changing delay, and hence the order, in a DelayQueue
So I was looking at building a simple object cache that expires the objects after a given time. The obvious…
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