Home » Author Archives: Nikos Maravitsas

Author Archives: Nikos Maravitsas

Nikos Maravitsas
Nikos has graduated from the Department of Informatics and Telecommunications of The National and Kapodistrian University of Athens. During his studies he discovered his interests about software development and he has successfully completed numerous assignments in a variety of fields. Currently, his main interests are system’s security, parallel systems, artificial intelligence, operating systems, system programming, telecommunications, web applications, human – machine interaction and mobile development.

Java EE 8 : What does the community want?

java-interview-questions-answers

Following the earlier two community surveys, the first announced in December 2013 and the second in January 2014, Oracle calls the enterprise community for a third and final survey on Java EE 8.  The closing date for the survey will be March 24, 2014 at 12 AM Pacific Time. It is worth noting that while the first two surveys revealed the ...

Read More »

Apache Cassandra steaming through 2.1 Release

apache-cassandra-logo

Apache Cassandra is a high performance database system used in an ever growing number of enterprise companies to whom scalability is of major importance. For instance, Netflix, ebay, Reddit and many more companies are adopting Cassandra to their systems, not to mention that Facebook played a crucial part on making it an open source Top Level Project in the first place. Cassandra  is ...

Read More »

Android Header and Footer layout example

android-logo

In this article we are going to see how you can create a simple Android Layout that includes a header part, a footer part and the content area. It is relatively easy to do that in the Android platform. The important bit is to try to make your layouts reusable and independent from one another, so you can use it ...

Read More »

EJB passivation and activation example

java-interview-questions-answers

In this tutorial we are going to see how activation and passivation works in a Stateful Java Enterprise Session Bean. 1. Introduction Stateful Session Beans usually hold information about a specific client, and holds that information throughout the whole session. It is a fact though, that client sessions tend to be active for a respectable amount of time, and of ...

Read More »

Java EE Stateful Session Bean (EJB) example

java-interview-questions-answers

In this article we are going to see how you can use Stateful Session Beans to keep track of state across a client Session in a simple Web Application. 1. Introduction Stateful Session Beans usually hold information about a specific client’s session, and holds that information throughout the whole session (opposed to Stateless Session Beans). A Stateful EJB instance is ...

Read More »

Java EE EJB Interceptors tutorial and example

java-interview-questions-answers

In this example we are going to see how to use Interceptors in an EJB and test it using a simple Web Application. 1. Introduction Interceptors are used, as the name suggests, when you want to intercept calls to EJB methods. If you declare an Interceptor for a Bean, every time a method of that Bean is invoked, it will ...

Read More »

Android Studio Tutorial: Getting started with the new Android IDE

android-logo

In May 15th, during Google’s I/O developer conference, a new developer suite called Android Studio was announced. It is a very powerful IDE based on the famous IntelliJ IDE. Android Studio offers a lot more options for Android Developers on top of InteliJ’s fantastic features and deep code analysis. And it seems that it is aimed to the Android Professionals ...

Read More »

Modal dialog (popup) from Android widget example

android-logo

In this example we are going to see  how you can create an Android widget in the home screen that can open a pop up dialogue box. As you know, Android Widgets are small applications that can basically do two things. Launch a new Activity when pressed, or display information that get updated at a decided time interval. 1. Introduction ...

Read More »

Android Hello World Example – How to develop android apps

android-logo

In this tutorial, we will go through the necessary steps you need to take in order to develop your first Android application in Eclipse IDE using the ADT plugin and run it with an Android Virtual Device. The ADT plugin provides easy Android Project creation and management with rich editor features and documentation as well as Android Virtual Device (AVD) management.   ...

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.