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 ....

 

 

Better error messages with Bean Validation 1.1 in Spring MVC application

java-interview-questions-answers

Bean Validation 1.1, among many new features, introduced error message interpolation using Unified Expression Language (EL) expressions. This allows to define error messages based on conditional logic and also enables advanced formatting options. Added to a Spring MVC application let you display more friendly error messages quite simply. In the first part of this article I will shortly describe message ...

Read More »

Java EE7 and Maven project for newbies – part 6

java-interview-questions-answers

Resuming from the previous parts Part #1, Part #2, Part #3, Part #4, Part #5 In the previous post (part 5), we discovered how we can unit test using Arquillian, our EJB services, deploying them in a ‘real’ instance of Wildfly8.1 application server. Extending the previous example we will add some more configuration and code, so that we can add ...

Read More »

Saving preferences in your Android application

android-logo

This is the third post in my series about saving data in Android. The other posts can be found here : http://www.javacodegeeks.com/2014/06/introduction-how-to-save-data-in-your-android-application.html http://www.javacodegeeks.com/2014/06/saving-data-to-a-file-in-your-android-application.html A preference is a type of data that needs to be saved by most applications. Preferences allow users to change how the application works by giving choices about things like the layout, the features to enable and ...

Read More »

Spring Boot: Fast MVC start

java-interview-questions-answers

I was planning to write an article about Spring Boot more than a year ago. Finally I have the time and inspiration for this. So prepare yourself for 10 – 15 minutes of high quality Spring tutorial. I’m going to demonstrate Spring Boot basics with Gradle and embedded Tomcat. I use Intellij IDEA instead of Eclipse but this shouldn’t be ...

Read More »

The hi/lo algorithm

software-development-2-logo

Introduction In my previous post I talked about various database identifier strategies, you need to be aware of when designing the database model. We concluded that database sequences are very convenient, because they are both flexible and efficient for most use cases. But even with cached sequences, the application requires a database round-trip for every new the sequence value. If ...

Read More »

I Don’t Think That Software Development Word Means What You Think It Means

software-development-2-logo

There are several terms used inappropriately or incorrectly in software development. In this post, I look at some of these terms and the negative consequences of misuse of these terms. “agile” The Agile Manifesto started a movement that resonated with many software developers frustrated with inefficiencies and inadequacies of prevalent software development methodologies. Unfortunately, the relatively simple concepts of the ...

Read More »

A little bit on the JVM and JIT

java-logo

As you might be aware, the JVM (Java Virtusal Machine) is what makes it possible for Java to adhere to the write-once-run-anywhere paradigm. At its core, the JVM consists of the following components: Heap Stack PermGen and Method Area JIT Compiler Code cache     The heap is where memory is allocated for every new operator you use during the ...

Read More »

Using Markdown syntax in Javadoc comments

software-development-2-logo

In this post we will see how we can write Javadoc comments using Markdown instead of the typical Javadoc syntax. So what is Markdown? Markdown is a plain text formatting syntax designed so that it optionally can be converted to HTML using a tool by the same name. Markdown is popularly used to format readme files, for writing messages in ...

Read More »

NoSQL – A Quick Guide

software-development-2-logo

NoSQL is buzz word nowadays among the developers and software professionals. 1. What is NoSQL ? NoSQL database, also called Not Only SQL, is an approach to data management and database design that’s useful for very large sets of distributed data. 2. Where to use NoSQL ? Use NOSQL, When project has unstructured big data that require real-time or offline ...

Read More »

So You Want to Use A Recruiter Part I – Recruit Your Recruiter

career-logo

This is the first in a three-part series to inform job seekers about working with a recruiter. Part II is “Establishing Boundaries” and Part III is “Warnings” This week I read an unusually high number of articles (and the comments!) about recruiting. Although most of the discussion quickly turns to harsh criticism, there are always a few people wondering the best ways to find ...

Read More »

Want to take your Java skills to the next level?

Grab our programming books for FREE!

Here are some of the eBooks you will get:

  • Advanced Java Guide
  • Java Design Patterns
  • JMeter Tutorial
  • Java 8 Features Tutorial
  • JUnit Tutorial
  • JSF Programming Cookbook
  • Java Concurrency Essentials