Sometimes you have the situation that an issue is only occurring on certain machines or only at a certain time of day. There are a couple of possible methods to investigate such an issue (like: adding extra logging), however I would like to add an other one: remote debugging trough ...

Update: this article has been crossposted to the Transylvania JUG blog.

The Java collections framework includes the concept of NavigableSets / NavigableMaps. The principle behind these interfaces is that taking a SortedSet/SortedMap you can use a subset of it. Some examples:

Given the following set:

@Before
public void ...

Update: This entry has been crossposted to the transylvania-jug blog.

Problem statement: you have some value objects for which you implemented toString() (for debugging purposes) and now you would like to test using a unit test that these implementations exist.

Possible solutions:

1. Use reflection to detect the existence of the ...

Lets say that you have the following problem: you want to write a script which processes the output of a program and writes out the modified somewere, with as little buffering as possible. One concrete example (for which I needed the script) is log rotation: you want to save the ...

Below is a a short comparative review of tow books about Java concurrency which I’ve read in the last couple of months. Disclaier: the Amazon links are affiliate ones.

Java Concurrency in Practice is an interesting book, which should be a must-read for anyone doing concurrent programming in Java ...

noevir is a “direct marketing” company focusing on cosmetics and “* care” (skin, body, etc) type of products. After looking at their site I’m mostly neutral about them. I wouldn’t recommend anyone to join such (“direct marketing”) organizations, but that’s not specific to noevir. It also says “Ginza ...

scentsy has an interesting concept for providing different scents in the room: rather than burning different materials (like candles or sticks) it uses a lightbulb to heat the wax. This provides a “smoke-free” way to enjoy your fragrances. An other advantage of the concept is that it keeps the warm ...

The problem: lets say you have a program which generates data to the clipboard (or it is easier to get the data into the clipboard than into a file) and you want to process the data (create a summary for example).

Perl to the rescue!

Get the Clipboard module (if ...

I want to preface this with the following: I don’t want to pull a fanboy move here. The only thing I assert is that a recent OS (ie. Ubuntu 10.10) can give a considerable performance improvement (without changing the hardware) compared to an almost 10 year old OS ...

Not long ago I saw some java code from Simone Tripodi. It generates synchronization wrappers around arbitrary objects at runtime in a typesafe manner with a couple of easy to understand lines of code. The heavy lifting is done by the dynamic proxy mechanism available from Java 1.5 if ...