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Selecting your Collections library

Is this really something you should bother? Is there something fundamentally wrong with java.util.ArrayList and java.util.HashMap? For most of the source code out there the answer is ...
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Should Java be more high level or low level?

Overview Java 8 is bringing much antisipated features such as Lambda expressions, Type Annotations and Virtual Extensions. While this functionality is a) valuable, b) playing catch ...
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JUnit test method ordering

Junit until version 4.10 uses the order of test methods in a test class as returned by the reflection API as the order of test method execution - Class.getMethods(). To quote the Javadoc ...
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Inferred exceptions in Java

It’s always nice to borrow and steal concepts and ideas from other languages. Scala’s Option is one idea I really like, so I wrote an implementation in Java. It wraps an object ...
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Executing a Command Line Executable From Java

In this post we’ll deal with a common need for Java developers. Execute and manage an external process from within Java. Since this task is quite common we set out to find a Java ...
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Java Deadlock Example – How to analyze deadlock situation

Deadlock is a programming situation where two or more threads are blocked forever, this situation arises with at least two threads and two or more resources. Here I have written a simple ...
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Java – The 2012 Review and Future Predictions

This post will focus on the events big and small that occurred in 2012 and also take a look at some future predictions for 2013. Some of the predictions will be honest guesses, others…. ...
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Local variables inside a loop and performance

Overview Sometimes a question comes up about how much work allocating a new local variable takes.  My feeling has always been that the code becomes optimised to the point where this ...
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Weak, Weaker, Weakest, Harnessing The Garbage Collector With Specialist References

When and when not to use specialist references in Java Weak, Soft and Phantom references are dangerous and powerful. If they are used the wrong way they can destroy JVM performance; ...
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Using Apache Commons Functor functional interfaces with Java 8 lambdas

Apache Commons Functor (hereon [functor]) is an Apache Commons component that provides a functional programming API and several patterns implemented (visitor, generator, aggregator, ...
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