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Mockito 101

Mockito is a mocking framework that lets you write beatiful tests with clean and simple API. It biases toward minimal specifications, makes different behaviors look different, and displays ...
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JVM PermGen – where art thou?

This post covers some basics of JVM memory structure and quickly peeks into PermGen to find out where it has disappeared since advent of Java SE 8. Bare Basics The JVM is just another ...
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Caveats of HttpURLConnection

Does this piece of code look ok to you?                     HttpURLConnection connection = null; try { connection = (HttpURLConnection) ...
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Name of the class

In Java every class has a name. Classes are in packages and this lets us programmers work together avoiding name collision. I can name my class A and you can also name your class A ...
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Typical Mistakes in Java Code

This page contains most typical mistakes I see in the Java code of people working with me. Static analysis (we’re using qulice can’t catch all of the mistakes for obvious ...
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Memory leaks – measuring frequency and severity

This post is part of our open culture – we continue sharing insights from our day-to-day work. This time we take a peek at the very core of our value proposition, namely – looking ...
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Garbage Collectors – Serial vs. Parallel vs. CMS vs. G1 (and what’s new in Java 8)

The 4 Java Garbage Collectors – How the Wrong Choice Dramatically Impacts Performance The year is 2014 and there are two things that still remain a mystery to most developers – ...
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Creating an object stream from a JDBC ResultSet

The introduction of  features Stream API and Lambda in Java 8 enables us to make an elegant conversion from a JDBC ResultSet to a stream of objects just providing a mapping function. ...
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Simple Aspect Oriented Programming (AOP) using CDI in JavaEE

We write service APIs which cater to certain business logic. There are few cross-cutting concerns that cover all service APIs like Security, Logging, Auditing, Measuring Latencies and ...
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JPA Hibernate Alternatives. What can I use if JPA or Hibernate is not good enough for my project?

Hello, how are you? Today we will talk about situations that the use of the JPA/Hibernate is not recommended. Which alternatives do we have outside the JPA world? What we will talk ...
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