Java Resources

Add Custom Functionality to a Spring Data Repository

This how-to article explains how to get some extra mileage and flexibility out of Spring Data repositories.

June 6, 2016

by Emmanouil Gkatziouras

CORE

· 6,390 Views · 6 Likes

Troubleshoot OutOfMemoryError: Unable to Create New Native Thread

"java.lang.OutOfMemoryError: unable to create new native thread" got you down? Check out this article for some tips on how to deal with it.

June 4, 2016

by Ram Lakshmanan

CORE

· 173,217 Views · 12 Likes

Why a Single Java Source File Can Not Have More Than One Public Class

This article looks behind-the-scenes at why Java won't allow more than one public class in a single Java source file.

June 3, 2016

by Naresh Joshi

· 82,924 Views · 8 Likes

Microservice Architectures With Spring Cloud and Docker

How to set up a microservice architecture using Spring Boot, Spring Cloud, Docker, and some of Netflix's open source tools.

Updated June 2, 2016

by Alexander Lukyanchikov

· 311,606 Views · 306 Likes

Your Own Swagger UI on Liberty

IBM Websphere Liberty comes with great out of the box support for Swagger, including their own branded Swagger UI. You might, however, want to create your own branded UI.

June 2, 2016

by Phillip Kruger

· 17,216 Views · 3 Likes

CUBA Platform: An Open-Source Java Framework for Rapid Application Development

This article looks at the CUBA Platform – an open-source framework combining solid architecture, "must-have" features for enterprise applications, and rapid application development tools.

June 2, 2016

by Aleksey Stukalov

· 34,623 Views · 21 Likes

From Java Anonymous Class to Single Line Lambda in 3 Steps

See the steps involved in transforming traditional Java anonymous classes into Java 8 lambdas.

June 1, 2016

by Matthew Casperson

· 65,739 Views · 4 Likes

Benchmarking High-Concurrency HTTP Servers on the JVM

Benchmarking HTTP servers is beset by several difficulties: tests may be conducted with unrealistic parameters (e.g., pure overhead v maximum concurrency), and thus yield unuseful results. Our tests are different and produced some interesting outcomes that yielded new learnings about HTTP performance in the wild.

May 31, 2016

by Fabio Tudone

· 40,227 Views · 10 Likes

How Dependency Injection (DI) Works In Spring Java Application Development

This article explains the concept of Dependency Injection (DI) and how it works in Spring Java application development.

May 30, 2016

by Ethan Millar

· 258,550 Views · 25 Likes

Read YAML in Java with Jackson

Jackson is one of the best JSON libraries for Java. Now with the YAML extension of Jackson, we can use Jackson to process YAML in Java.

May 30, 2016

by Manik Magar

· 324,042 Views · 11 Likes

Setting Up Distributed Infinispan Cache with Hibernate and Spring

A pretty typical setup–a Spring and Hibernate application that requires a distributed cache. But it turns out to be not so trivial to setup.

May 26, 2016

by Bozhidar Bozhanov

· 17,594 Views · 3 Likes

Singleton Pattern: The Good, the Bad, and the Ugly

The singleton pattern is one of the most well-known design patterns... wait, or is it an anti-pattern? See how to implement the singleton in Java EE, and look at some of the pros and cons.

May 25, 2016

by Alex Theedom

· 15,353 Views · 9 Likes

Jackson Dependency Issue in Spring Boot with Maven Build

In this article, a Spring Boot 1.3.3 dependency issue is explored and an override is provided.

May 23, 2016

by John Thompson

· 171,909 Views · 10 Likes

Java Suspended Thread States

Java threads can be in six different states: NEW, RUNNABLE, BLOCKED, WAITING, TIMED_WAITING, and TERMINATED. We will explore them here.

May 19, 2016

by Ram Lakshmanan

CORE

· 161,237 Views · 19 Likes

Java 8 HashMaps, Keys, and the Comparable Interface

In this post, we are going to discover a new, important feature that Java 8 brings to us in the event of hash collisions.

May 18, 2016

by Tamás Györfi

· 37,019 Views · 41 Likes

Log4J 2 Configuration: Using the Properties File

This post looks at using and configuring the Log4j 2 properties file, letting you change various configuration options without modifying your application code.

May 18, 2016

by John Thompson

· 346,987 Views · 13 Likes

Working With Akka Actors

Here we're going to look at the Akka actor model with a simple example: fetching weather data from Yahoo.

May 18, 2016

by Hardik Pandya

· 12,619 Views · 10 Likes

Dynamic HTML Templates With FreeMarker and Vaadin

Skip the HTML! Learn about utilizing FreeMarker and Vaadin to help you generate HTML templates, so you don't have to write them yourself.

May 17, 2016

by Alejandro Duarte

CORE

· 14,848 Views · 2 Likes

Java 8: Declare Private and Protected Methods in Interfaces

In the upcoming Java 9 release, it will be possible to declare private and protected methods in interfaces. Learn how you can use almost the same features in Java 8 interfaces today.

May 14, 2016

by Per-Åke Minborg

· 44,496 Views · 13 Likes

Java EE 8 MVC: Global Exception Handling

Adding global exception handling to an Java EE MVC application is quite simple.

May 13, 2016

by Michael Scharhag

· 12,348 Views · 8 Likes

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