Core Java
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Default methods and multiple inheritance
Recently Lukas JOOQ Eder posted and article about nested classes and their use. This is an interesting topic and his…
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How to detect and diagnose slow code in production
One of the more difficult tasks that a developer faces is finding and diagnosing slow running code in production. Firstly…
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XSL Transformation in Java: An Easy Way
XSL transformation (XSLT) is a powerful mechanism for converting one XML document into another. However, in Java, XML manipulations are…
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A JSF List Example
This is an example list application built using JSF 2.0 (JavaServer Faces). The app is a list of todo (to…
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Top 10 Easy Performance Optimisations in Java
There has been a lot of hype about the buzzword “web scale“, and people are going through lengths of reorganising…
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How JVMTI tagging can affect GC pauses
This post is analyzing why and how Plumbr Agents extended the length of GC pauses on certain occasions. Troubleshooting the underlying problem…
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Do not unit test bugs
Before getting to the topic of the title let’s have a simple programming sample. On the programming task I will…
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Inconsistent operation widen rules in Java
Overview When you perform a unary or binary operation in Java the standard behaviour is to use the widest operand…
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JMH: How to setup and run a JMH benchmark
Health Warning! This post describes how to setup and run a simple JMH benchmark. Micro benchmarks are notoriously difficult to get…
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