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First Java 8 Experience

Like the rest of the world, I fell deeply in love with Slack. Why? Lot of reasons, but the main one is it provides a new means of really building the SDLC process around communication ...
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It’s All About Tests – Part 2

This is the second post of the series about testing. In the first part I explained about the mindset we need to have while developing with tests. Or, in better words, developing for ...
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A beginner’s guide to Java time zone handling

Basic time notions Most web applications have to support different time-zones and properly handling time-zones is no way easy. To make matters worse, you have to make sure that timestamps ...
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But that’s impossible, or finding out that the JIT has broken your code.

Every now and then you look at some code and think that it cannot be possibly be wrong. Once you have ruled out a simple programmer screw up / enemy action in code (Make sure you read ...
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Java Reflection Tutorial – The ULTIMATE Guide

This tutorial is about reflection, the ability of a computer program to examine and modify the structure and behavior (specifically the values, meta-data, properties and functions) ...
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It’s All About Tests – Part 1

This post is the first of a series of three.Mindset of testing Techniques Tools and TipsThe Mindset Testing code is something that needs to be learned. It takes time to absorb how ...
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Unit Testing exercise with FizzBuzz and JUnitParams

I sometimes use FizzBuzz to demonstrate the basics of unit testing to newbies. Although FizzBuzz is really simple problem, it can also be used to demonstrate more advanced unit testing ...
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Multithreading and Concurrency Interview Questions and Answers – The ULTIMATE List (PDF Download)

EDITORIAL NOTE: Concurrency is always a challenge for developers and writing concurrent programs can be extremely hard. There is a number of things that could potentially blow up and ...
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Java performance tuning survey results (part I)

We conducted a Java performance tuning survey during October 2014. The main goal of the survey was to gathering insight into Java performance world to improve the Plumbr product offering. ...
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How Immutability Helps

In a few recent posts, including “Getters/Setters. Evil. Period.”, “Objects Should Be Immutable”, and “Dependency Injection Containers are Code Polluters”, ...
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