Learn how to create a Docker image with Ubuntu 15.04 and Java 7 or 8.

This interview covers topics from lambdas in Java 8, to the sun.misc.Unsafe controversy, to VarHandle in Java 9, to the work of Chronicle Software, which is amazing.

Learn how to build RESTful web services in Spring that can utilize either JSON or XML.

See how you can use the Stream API in Java 8 to transform data

Find out what the most popular Java / JVM language web frameworks are in 2015.

Blocking APIs can hurt your applications performance. So does using Asynchronous EJBs help?

Struggling with managing SQL statements in your Java code? Let Zemian give you away out!

A simple scatter-gather scenario using Java 8 CompletableFuture and using Rx-Java Observable.

Remove boilerplate code in your JUnit tests with parameterized tests.

Learn how to use the Bean Validation outside of your Java EE container.

Learn unit testing concepts, JUnit constructs, how to write good assertions, JUnit 4 annotations, and JUnit test suites.

Using JMX you can monitor you Java EE servers for key metrics.

Learn how you can use partially applied functions in Java 8

How to use Spring Integration to keep domain and integration concerns separate and simple for many Spring-based applications.

How to put Spring, Spring Boot, and Spring Cloud together to create a microservice.

You can start using Apache Camel routes in Java EE components by integrating Camel with the WildFly App Server, using the WildFly-Camel Subsystem.

Take your first steps in using JUnit to unit test your Java code with the help of tools like Maven, a build tool, and IntelliJ IDEA, a popular IDE.

H2 as a memory database for Spring-based applications is lightweight, easy to use, and emulates other RDBMS with the help of JPA and Hibernate.

Using Permutations, you can try all combinations of an input set.

Yeah, they don't really exist, but we can use polymorphism, method overloading and default methods instead to make it a bit more convenient to use our APIs. As an example, here's an event bus implementation where I can register event handlers with an optional header parameter. Bus bus = new Bus(); bus.register(event -> System.out.println("I gots an event")); bus.register((event,header) -> System.out.println("I gots an event w/ header")); Here are the dirty details on how you can do this (and - when dispatching - events, use default methods to avoid type coercion.