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Archive for the 'java' Category

Quick reference to OpenADR 2.0 standard

Friday, April 10th, 2015

The standard OpenADR 2.0 is a standard for automated demand response in power grids. It includes both a human-readable description and a formal specification  in the form of XML schema. (Please note that, while the standard specification can be downloaded for free for evaluation purposes, actual usage is subject to limitations as specified by the [...]

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When I wanted to pack a simple java desktop application as a Web Start application I had problems with already signed jars – after Web Start dialog showed on the screen, I got “jar resources in jnlp file are not signed by the same certificate” problem. There exist other ways to tackle the problem (for [...]

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When developing a non-trivial Eclipse plug-in, chances are that you would like to use existing modules, libraries etc. The most widely used stuff, e.g. log4j, is already available as an Eclipse plug-in, so you can just mark your plug-in as dependant on the appropriate existing ones. For others, the right way is to convert them [...]

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Recent Java networking problems, anyone?

Thursday, December 24th, 2009

I just noticed that all of a sudden no Java program can access network anymore. After reinstalling a fresh Sun JDK, checking all policies and properties and proxies, none of which helped, I finally managed to ask the all-knowing One the right question. It’s got to do with premature eja… erm … IPv6 exclusivity. Checking [...]

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Virtual Globe on Android

Monday, May 11th, 2009

For some time we wanted to try Gaea+ on a mobile device of some sort. The G-1 phone, featuring the Java-centric Android software stack, OpenGL ES, and a quite fast CPU and GPU, seemed powerful enough for this task. The Android programming model is too different to just port the whole thing in an evening [...]

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