Do you want to know how to develop your skillset to become a Java Rockstar?

Subscribe to our newsletter to start Rocking right now!

To get you started we give you our best selling eBooks for FREE!

1. JPA Mini Book

2. JVM Troubleshooting Guide

3. JUnit Tutorial for Unit Testing

4. Java Annotations Tutorial

5. Java Interview Questions

and many more ....


Hello World! What Every CS Student Should Know About the First Job


Anyone involved with hiring entry-level technology professionals (or reads posts on Reddit’s cscareerquestions forum) is aware that students are being prepared by schools for how to do work in the industry, but are often ill-prepared on how to find work in the industry.  There is a major difference between the two, and many grads are being edged out on jobs by equally or ...

Read More »

Don’t You Know that Support is the Most Important Part of a Developer’s Job?


Agile development – because you are building working software faster and delivering it incrementally – forces development teams to face a common, fundamental problem: how to balance the work of developing new software with the need to support a system that is already being used in production, whether it’s the legacy system that you’re replacing, or the system that you ...

Read More »

How to use Asynchronous Servlets to improve performance


This post is going to describe a performance optimization technique applicable to a common problem related to modern webapps. Applications nowadays are no longer just passively waiting for browsers to initiate requests, but want to start the communication themselves. A typical example could involve chat applications, auction houses, etc – the common denominator being the fact that most of the ...

Read More »

All Other Metrics Are Useless


When it comes to queues, whether they’re implemented as JMS, database tables (i.e. what Ruby’s Delayed::Job uses for a queue), or even Amazon’s SQS, the most common metric used to evaluate the state of a queue is its length. In essence, one derives an efficiency metric based upon how many messages are residing in a queue at any given time. ...

Read More »

Creating an on-line recommender system with Apache Mahout


Recently we’ve been implementing a recommender system for Yap.TV: you can see it in action after installing the app and going to the “Just for you” tab. We’re using Apache Mahout as the base for doing recommendations. Mahout is a “scalable machine learning library” and contains both local and distributed implementations of user- and item- based recommenders using collaborative filtering ...

Read More »

Detect Maven Dependency Mediation


As of Maven 2.0.9 a new feature was added to Maven called dependency mediation. Dependency mediation is the technique used by Maven to resolve your project dependencies in the specific case when a dependency occurs multiple times in your dependency tree. Usually this occurs on transitive dependencies linked through the dependencies of your project. In these cases mediation will be ...

Read More »

Augmented Reality : Introduction of Metaio SD


Metaio SDK is advanced as compared to Vuforia SDK, Metaio SDK is developer friendly such that any beginner or novice developer can develop good quality of AR application. High-level system overview 1. Setup Metaio SDK 4.5 I assume that you already have Android SDK and NDK setup in computer. Step 1: Download Metaio SDK 4.5 for Android Step 2: ...

Read More »

Introduction to Android Studio


Feeling good to be back at blog . Actually I have been managing GDG Ahmedabad, delivering android talks and managing workshops locally and outside my regions. Last month, I was quite busy in organizing “DevFest” event for the GDG Ahmedabad and then for the preparation of my 2 talks for the GDG Kathmandu DevFest. I was invited to deliver 2 ...

Read More »

Agile Project Management with GreenHopper 6 Blueprints


An intuitive guide to efficiently track and manage projects in an agile way using GreenHopper for JIRA. Engineering methodologies are plan-based and very much predictive in nature. The disciplined and procedural nature of engineering methodologies makes the whole software development process a bit slow and inefficient. The outcome of this has been the development of Agile methodologies. The benefit of ...

Read More »

instanceof operator and Visitor pattern replacement in Java 8


I had a dream where instanceof operator and downcasting were no longer needed but without clumsiness and verbosity of visitor pattern. So I came up with the following DSL syntax:                 Object msg = //... whenTypeOf(msg). is(Date.class). then(date -> println(date.getTime())). is(String.class). then(str -> println(str.length())). is(Number.class). then(num -> println(num.intValue())). orElse(obj -> println("Unknown " + ...

Read More »
Want to take your Java Skills to the next level?
Grab our programming books for FREE!
  • Save time by leveraging our field-tested solutions to common problems.
  • The books cover a wide range of topics, from JPA and JUnit, to JMeter and Android.
  • Each book comes as a standalone guide (with source code provided), so that you use it as reference.
Last Step ...

Where should we send the free eBooks?

Good Work!
To download the books, please verify your email address by following the instructions found on the email we just sent you.