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Add Some Entropy to Your JVM

Being able to generate true random numbers depends on the entropy in your system. Some claim, that this can be guaranteed by fair dice roll. Others think that replacing the OpenJDK’s ...
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Crawling the Web with Cassandra and Nutch

So, you want to harvest a massive amount of data from the internet?  What better storage mechanism than Cassandra?  This is easy to do with Nutch. Often people use Hbase behind Nutch. ...
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Getting Started With Jedis

Hi, these days I started looking into Redis. I’ve heard a lot about it so I decided to have a try. Redis is defined in its websites as “an open source, advanced key-value store. ...
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Too Many Parameters in Java Methods, Part 5: Method Naming

In my previous post (Part 4 of my series on dealing with too many parameters in Java methods), I looked at method overloading as one approach to providing clients with versions of methods ...
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Neo4j: Exploring new data sets with help from Neo4j browser

One of the things that I’ve found difficult when looking at a new Neo4j database is working out the structure of the data it contains. I’m used to relational databases where you ...
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Programming: Thinking or Typing, Thinking and Typing

“If you don’t think carefully, you might think that programming is just typing statements in a programming language.” Ward Cunningham, in the Forward to The Pragmatic Programmer Software ...
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Java User Defined Types (UDT) in Java DB

Java DB is a relational database management system that is based on the Java programming language and SQL. This is the Oracle release of the Apache Software Foundation’s open ...
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Android Image Filters

Introduction Image Filter allows you to add various effects on image. There are mainly two purpose of Image Processing:Image Understanding: It is used to identify content of image, ...
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Tower Defense in JavaFX (2)

In the last part we’ve created a simple editor that let’s us place turrets. Now we’ll add a spawnpoint where the enemies originate, and define an attack target for them. First ...
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Hawtio & Apache JClouds

Introduction I’ve spent some time lately working on an Apache Jclouds plugin for Hawtio. While there is still a lot of pending work, I couldn’t hold my excitement and wanted ...
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