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Garbage Collection Analysis of PCGen

Introduction I decided to combine two software loves of mine and perform some analysis on PCGen, a popular Java based open source character generator for role-playing games. I used ...
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How many threads do I need?

It depends on your application. But for those who wish to have some insight about how to squeeze out most from all those expensive cores you have purchased for your production site ...
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QOTD: Java Thread vs. Java Heap Space

The following question is quite common and is related to OutOfMemoryError: unable to create new native thread problems during the JVM thread creation process and the JVM thread capacity. ...
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The Importance of Packages

I remember approximately 15 years ago when I started learning Java. I read a lot about this ‘package’ thing and ‘namespaces’ and I totally didn’t get it. Sad thing is: While ...
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Java heap space, native heap and memory problems

Recently, I was discussing with a friend, why the Java process uses more memory than the maximum heap that we set when starting the java process. All java objects that code creates ...
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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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