Tag Archives: java

Installing Oracle’s JDK on Debian/Ubuntu

Posted on November 9, 2014 by Matthias

Due to licensing issues, Linux distributions don’t ship Oracle Java packages anymore. In many cases, that doesn’t matter since you can just use OpenJDK. But if you do need Oracle’s JDK, Debian packages are a bit more convenient than handling … Continue reading →

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Maven: Discovering Dependency Conflicts

Posted on August 30, 2014 by Matthias

Among other things, Maven’s dependency plugin displays the result of Maven’s dependency resolution mechanism. The output of the dependency:tree goal makes it easy to see where transitive dependencies come from. This week I discovered that recent versions of the plugin … Continue reading →

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Testing equals() with Guava

Posted on July 21, 2014 by Matthias

I’ve long held the opinion that Guava belongs on every Java classpath because its design and the quality of its implementation surpass other comparable utility libraries (and sometimes even the JDK). Guava’s testlib is pretty cool, too, even though it’s … Continue reading →

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Visualizing Package Dependencies

Posted on August 26, 2012 by Matthias

Managing module or package dependencies is an important design activity that helps to keep a software project maintainable. Visualizing these dependencies is a good way of getting a first impression on a project and for exposing design problems. In this … Continue reading →

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Maven Archetypes Updated!

Posted on July 1, 2012 by Matthias

Two years ago, I published a Maven archetype for Hadoop that turned out to be quite popular, judging from the comments I received and the access logs on my server. Today I’ve updated it to use the latest version of … Continue reading →

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Hudson vs. Jenkins Revisited

Posted on December 27, 2011 by Matthias

When the Hudson/Jenkins fork was announced earlier this year, the case seemed pretty clear. There were heroes from the Open Source community, among them Hudson’s original author, and there was everybody’s favorite villain, Oracle. Back in February, I would have … Continue reading →

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Writing Hamcrest Matchers

Posted on August 2, 2011 by Matthias

JUnit 4 introduced a fancy DSL based on the Hamcrest framework for expressing assertions. JUnit ships with the most important matchers and you can always add Hamcrest to your classpath if you need more. Sometimes no existing matcher fits your … Continue reading →

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JBoss: Running Multiple Instances on One Host

Posted on July 10, 2011 by Matthias

Occasionally, it’s useful to run multiple JBoss instances on one machine. Like with any network server, this is difficult because only one application can bind to a port at any given time. You have to assign different sets of ports … Continue reading →

Posted in java | Tagged , , | 2 Comments