Core Java
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Spice up your test code with custom assertions
Inspired by the @tkaczanowski talk during GeeCON conference I decided to have a closer look at custom assertions with AssertJ…
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Java 8 Friday: Better Exceptions
At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled…
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Why use SerialVersionUID inside Serializable class in Java
Serialization and SerialVersionUID is always remains a puzzle for many Java developers. I often see questions like what is this…
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See Your Solr Cache Sizes: Eclipse Memory Analyzer
Solr uses different caches to prevent too much IO access and calculations during requests. When indexing doesn’t happen too frequently…
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Writing Clean Tests – Beware of Magic
It is pretty hard to figure out a good definition for clean code because everyone of us has our own…
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Java Singleton Design Pattern
Its one of the simplest design pattern in Java. If any one asks me which design pattern you are good…
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How to find Prime Factors of Integer Numbers in Java – Factorization
One of the common homework/task in programming courses is about Prime Factorization. You are asked to write a program to find…
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OutOfMemoryError on overprovisioned heap
Why am I getting the OutOfMemoryError when allocating a data structure that should happily fit within the heap I have…
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Java 8 default methods can break your (users’) code
At first glance, default methods brought a great new feature to the Java Virtual Machine’s instruction set. Finally, library developers…
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