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Java Debugger – The Definitive List of Tools

Java debugging is a complex space. There are many types of debuggers, and numerous tools to choose from. In this page, we’ll cover the differences between 7 types of debuggers, and ...
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More Common Red Flags in Java Development

In the post Common Red Flags in Java Development I looked at some practices that are not necessarily wrong or incorrect in and of themselves, but can be indicative of potentially greater ...
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Decoding Java.Lang.OutOfMemoryError: PermGen Space

One of the least understood areas by Java Developers is garbage collection. Java Developers feel JVM takes care of garbage collection and they need not worry about memory allocation, ...
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Java.io in nutshell: 22 case studies

This post attempts to cover a comprehensive set of operations in java.io. Compared with other books and blogs related to this topic, my motivation is to show “how-to” through case ...
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(Part 1 of 3): Synopsis of articles & videos on Performance tuning, JVM, GC in Java, Mechanical Sympathy, et al

I have been contemplating for a number of months about reviewing a cache of articles and videos on topics like Performance tuning, JVM, GC in Java, Mechanical Sympathy, etc… ...
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Using Matchers in Tests

Gone are the days when we were forced to write way too many assertion lines in our testing code. There is a new sheriff in town: assertThat and his deputy: the matchers. Well, not that ...
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G1 vs CMS vs Parallel GC

This post is following up the experiment we ran exactly a year ago comparing the performance of different GC algorithms in real-life settings. We took the same experiment, expanded ...
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Investigating Memory Leaks Part 1 – Writing Leaky Code

I found this little problem the other day: there’s this server that runs for a while and then falls over. It’s then restarted by its startup script and the whole process repeats ...
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A Lesser-Known Java 8 Feature: Generalized Target-Type Inference

Going through the list of Java 8 features, Generalized Target-Type Inference struck me as a particularly interesting, lesser-known gem. It looks as though the Java language designers ...
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Crashing your JVM

Thorough testing can be harmful as we discovered recently. Extending our test coverage led us to a several-hours debugging session caused by just one line of code. What made the debugging ...
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