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Too Fast, Too Megamorphic: what influences method call performance in Java?

Whats this all about then? Let’s start with a short story. A few weeks back I proposed a change on the a Java core libs mailing list to override some methods which are currently final. ...
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Okay, everybody who touches Java bytecode

The Oracle v. Google holds that copying the Structure, Sequence, and Organization of the Java APIs is a copyright violation. And a copyright violation is not just the act of copying, ...
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Debugging to understand Finalizers

This post is covering one of the Java built-in concepts called Finalizer. This concept is actually both well-hidden and well-known, depending whether you have bothered to take a look ...
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Java 8 Friday: Language Design is Subtle

At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every ...
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Chronicle and low latency in Java

Overview I was watching this excellent presentation by Rolan Kuhn of Typesafe on Introducing Reactive Streams At first glance it appears that it has some similar goals to Chronicle, ...
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Writing Clean Tests – It Starts from the Configuration

It is pretty hard to figure out a good definition for clean code because everyone of us has our own definition for the word clean. However, there is one definition which seems to be ...
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Three-State Booleans in Java

Every now and then, I miss SQL’s three-valued BOOLEAN semantics in Java. In SQL, we have:TRUE FALSE UNKNOWN (also known as NULL)Every now and then, I find myself in a situation ...
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Common Java Myths

These are questions which are likely to be too advanced to ask in any interview as they may just put candidates off.  Never the less, they may be work practising in your own time.                 Myth ...
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The effects of programming with Java 8 Streams on algorithm performance

Multi-paradigm programming with Java has been possible for many years, with its support for a mix of service oriented, object oriented and aspect oriented programming. Java 8 with its ...
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Java 8 Friday: Let’s Deprecate Those Legacy Libs

At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every ...
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