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Using junit for something else

junit != unit test Junit is the Java unit testing framework. We use it for unit testing usually, but many times we use it to execute integration tests as well. The major difference ...
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Java 8 pitfall – Beware of Files.lines()

There’s a really nice new feature in Java8 which allows you to get a stream of Strings from a file in a one liner.                   List ...
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Calculate PageRanks with Apache Hadoop

Currently I am following the Coursera training ‘Mining Massive Datasets‘. I have been interested in MapReduce and Apache Hadoop for some time and with this course I hope to get ...
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Database Migrations in Java EE using Flyway

Database schema of any Java EE application evolves along with business logic. This makes database migrations an important of any Java EE application. Do you still perform them manually, ...
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TDD Against the Clock

A couple of weeks ago I ran a “TDD Against the Clock” session. The format is simple: working in pairs following a strict red-green-refactor TDD cycle we complete a simple kata. ...
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Determining File Types in Java

Programmatically determining the type of a file can be surprisingly tricky and there have been many content-based file identification approaches proposed and implemented. There are ...
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Using JDK 8 Streams to Convert Between Collections of Wrapped Objects and Collections of Wrapper Objects

I have found Decorators and Adapters to be useful from time to time as I have worked with Java-based applications. These “wrappers” work well in a variety of situations ...
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Even Doctors Will Be Data Scientists

We all know how it works. You walk into a doctor’s office complaining about some pain in your leg or otherwise. They take your temperature, get you on the scale, check your blood ...
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JBoss Fuse – Some less known trick

TL;DRexpose java static calls as Karaf shell native commands override OSGi Headers at deploy time override OSGi Headers after deploy time with OSGi FragmentsExpose java static calls ...
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The Optimum Method to Concatenate Strings in Java

Recently I was asked this question – Is it bad for performance to use the + operator to concatenate Strings in Java? This got me thinking about the different ways in Java to ...
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