Latest Articles

17 September 2014

In this article we will cover Java 8 Streams.

Java 8 introduced streams as way to perform functional operations over collections of elements, such as the traditional map-reduce transformations. In this article we will cover the most important fea... Read more

java java8

Java 8 Optional

02 August 2014

In this article we will cover Java 8 Optional.

As the Optional documentation states, it's a container object which may or may not contain a non-null value. Google Guava library users may be already familiar with the Optional class since it was alr... Read more

java java8

JSF Nested Flows

27 July 2014

In this article we will cover JSF nested flows: How to call a nested flow, pass parameters into the flow and return to the main flow.

As we have seen in JSF Flow example, Java EE 7 brought the concept of flows into JSF. In this article we will not cover the basics (ex: flow configuration) as those subjects were already covered in th... Read more

flow java-ee jsf web

Java 8 Consumer and Supplier

17 July 2014

In this article we will cover Java 8 Consumer and Supplier interfaces.

The Consumer and Supplier interfaces are a couple of Functional Interfaces that belong to the new Java 8 java.util.function package. As the package name states, these interfaces are meant to be used t... Read more

java java8

Java 8 Predicates and Functions

12 July 2014

In this article we will cover Java 8 Predicate and Function interfaces.

Google Guava library users are already familiar with the concepts that we will cover in this article. Predicate and Function are a couple of useful Functional Interfaces introduced in Java 8 (more inf... Read more

java java8

Java 8 Method References

02 July 2014

In this article we will cover Java 8 method references.

As we have seen in Java 8 Lambda expressions example Java 8 introduced the concept of Functional Interfaces, which in turn may be implemented by the means of lambda expressions. As a reminder, a Funct... Read more

java java8

Java 8 Lambda expressions example

31 May 2014

In this article we will cover Java 8 Lambda expressions.

While implementing single method interfaces - often to be passed as a parameter to another function as callbacks - we often end up writing an anonymous class. Considering what we want to achieve, we m... Read more

java java8

Java 8 Interface Default Methods example

15 May 2014

In this article we will cover Java 8 interface default methods.

One of the new features introduced in Java 8 consists in interface default methods, also know as Extension Methods. Interfaces now may also provide default method implementations: TestInterface.java ... Read more

default-methods java java8

About the author

Gonçalo Marques is a Software Engineer with several years of experience in software development and architecture definition. During this period his main focus was delivering software solutions in banking, telecommunications and governmental areas. He created the Bytes Lounge website with one ultimate goal: share his knowledge with the software development community. His main area of expertise is Java and open source.

GitHub profile: https://github.com/gonmarques

He is also the author of the WiFi File Browser Android application: