Java Resources

Amazing Open Source Android Apps Written in Java

Because the only thing better than a free app is a free app you have the source code to.

January 3, 2019

by Vijay Singh Khatri

CORE

· 114,043 Views · 10 Likes

Spring Boot and PostgreSQL

In this tutorial, we will be developing a Spring-Boot application with Spring Data JPA to show how to do CRUD operations with PostgreSQL.

January 3, 2019

by Rajesh Bhojwani

· 305,408 Views · 16 Likes

Hexagonal Architecture for Java

Learn more about how you can isolate your core logic from outside elements.

January 3, 2019

by Rajesh Bhojwani

· 41,548 Views · 14 Likes

How Does Passing this::method Reference Within a Loop Affect Performance?

Do you know about the performance issues associated with this::method references?

January 3, 2019

by Ionut Balosin

· 5,922 Views · 2 Likes

Secure Spring Cloud Microservices With Vault and Nomad

Securing your microservices deployment is top-of-mind for any microservices-based project. We take a look at how to secure Spring Cloud microservices using Vault and Nomad.

January 2, 2019

by Piotr Mińkowski

· 11,462 Views · 2 Likes

Compact Number Formatting Comes to JDK 12

The upcoming JDK 12 will see support for Compact Number Formatting.

January 2, 2019

by Dustin Marx

· 13,078 Views · 5 Likes

Distributed Java Collections in Redis With Redisson

In this article, we go over an interesting open source database project and how it takes advantage of core principles of the Java language,.

January 2, 2019

by Nikita Koksharov

· 20,398 Views · 4 Likes

Primitives vs Objects in Java

Are there truly any non-null issues when using primitives instead of Objects?

January 2, 2019

by John Vester

CORE

· 147,699 Views · 12 Likes

Unit Testing Using Mockito and PowerMock

We take a look at these two great testing frameworks to see how they can help with a myriad of unit testing use cases.

January 1, 2019

by Murat Derman

· 41,456 Views · 3 Likes

Redis-Based Distributed Java Semaphores With Redisson

We take a look under the hood of this interesting open source database and see how ti uses Java methods to make distributed semaphores possible.

January 1, 2019

by Nikita Koksharov

· 13,181 Views · 5 Likes

Transformer Design Pattern in Java

Learn more about this special design pattern than can fluently transform into any type of object.

January 1, 2019

by Tomasz Linkowski

· 56,305 Views · 55 Likes

How to Use the Spring Config Server

Learn more about how to create remote configurations in your applications.

December 21, 2018

by Jesus J. Puente

· 172,016 Views · 27 Likes

Maven Skipping Tests

In this quick article, we will look into different ways to skip tests in maven applications.

December 21, 2018

by Ramesh Fadatare

· 37,868 Views · 7 Likes

Exception Handling in Java Streams

When you want to use a method that throws a checkedException, you have to do something extra if you want to call it in a lambda.

December 21, 2018

by Brian Vermeer

· 308,383 Views · 118 Likes

Microservices Architecture on the Modern Stack of Java Technologies

In this post, we take a look at microservices architectures based on technologies relevant to the Java world. Read on to get started!

Updated December 20, 2018

by Roman Kudryashov

CORE

· 65,198 Views · 42 Likes

How to Remove Key Value Pairs or Entries from HashMap [Snippet]

Let's take a look at how to remove entries from a map in Java, complete with examples.

Updated December 20, 2018

by Ramesh Fadatare

· 82,590 Views · 5 Likes

Speed Up Development with Docker Compose

Create environments that can be quickly deployed on other machines using Docker Compose.

December 20, 2018

by Gunter Rotsaert

CORE

· 20,766 Views · 3 Likes

Java: Aggregate Data Off-Heap

Explore how to create off-heap aggregations with a minimum of garbage collect impact and maximum memory utilization.

December 19, 2018

by Per-Åke Minborg

· 13,668 Views · 7 Likes

Simple Pagination Example With Spring Data and Thymeleaf

Need help with pagination?

December 19, 2018

by Oguzhan Dogan

· 55,320 Views · 3 Likes

Resilience4j and Sentinel: Two Open-Source Alternatives to Netflix Hystrix

We take a look at a few open source alternatives to the now deprecated Hystrix microservices tool.

December 19, 2018

by Leona Zhang

· 19,440 Views · 10 Likes

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