Java Resources

Create a Single Microservices Endpoint With GraphQL, Kotlin, and Micronaut

In today’s article, you will see an example on how to implement a GraphQL API on the JVM, particularly using Kotlin language and Micronaut framework.

March 16, 2020

by Roman Kudryashov

· 17,448 Views · 7 Likes

7 Easy Steps to Make a Facebook Messenger Bot in Java

Check out this step-by-step tutorial that shows you how to make a conversational bot using Facebook Messenger, Java, and JBot.

Updated March 16, 2020

by Ram Patra

· 28,557 Views · 12 Likes

REST API Error Handling With Spring Boot

Want to learn more about room for improvement in error handling? Check out this tutorial on REST API error handling in Spring Boot.

Updated March 16, 2020

by Ali Dehghani

· 86,429 Views · 32 Likes

8 Things Every Developer Should Know About Apache Ignite Caching

In this post, we go over how you should properly implement caching in your Ignite-based app to avoid any development headaches.

Updated March 16, 2020

by Shamim Bhuiyan

· 31,989 Views · 13 Likes

Make Slack Bots in Java in Minutes

Read up on BotKit — a framework on GitHub that lets you make your own cloud-ready Slack bot in mere moments.

Updated March 16, 2020

by Ram Patra

· 78,497 Views · 27 Likes

ConcurrentHashMap: Call Only One Method Per Key

Using the ConcurrentHashMap in a thread-safe way is easy.

Updated March 16, 2020

by Thomas Krieger

· 25,591 Views · 17 Likes

Comparing Apache Ignite In-Memory Cache Performance With Hazelcast In-Memory Cache and Java Native Hashmap

This article compares different options for the in-memory maps and their performances in order for an application to move away from traditional RDBMS.

March 16, 2020

by Krishna Munagala

· 8,816 Views · 4 Likes

Spring Boot - Microservice- JaxRS Jersey - HATEOAS - JerseyTest - Integration

In this article, we discuss how to write a Spring Boot microservice based on Spring Jax-Rs Jersey, HATEOAS API, and JerseyTest framework integration.

March 13, 2020

by Bogdan Oleinikov

· 13,060 Views · 4 Likes

Java vs. Go Microservices - Load Testing (Rematch)

In this article, we look at benchmarks for two versions of a basic application with Go and Java to see which has the smaller CPU/memory footprint.

March 12, 2020

by Sergey Kirichenko

· 27,356 Views · 16 Likes

Java Enterprise Annotations Part 1

In this article, we discuss popular Java annotations to sure up your understanding of this common pattern within enterprise applications.

March 12, 2020

by Dmitry Egorov

CORE

· 13,747 Views · 11 Likes

How Reactive Threads Works (Part 1)

In this article, let's see what reactive programming is and also see how Reactive threads work.

March 11, 2020

by Milind Deobhankar

· 8,001 Views · 4 Likes

Java Testing Complete Guide

In this article, we discuss nine of the most common types of application testing and review code samples and tools for each in Java.

Updated March 11, 2020

by Dmitry Egorov

CORE

· 59,186 Views · 38 Likes

How to Migrate From JUnit 4 to JUnit 5 Step by Step

In this tutorial, we take a look at how you can create and migrate a basic Spring Boot application from JUnit 4 to the refreshed JUnit 5.

March 11, 2020

by Awkash Agrawal

· 49,732 Views · 4 Likes

Distributed Java Queues on Top of Redis

In this article, we discuss six different types of Redis-based distributed queues using the Redisson Java framework.

Updated March 11, 2020

by Nikita Koksharov

· 34,823 Views · 8 Likes

Develop a Java Application With Kafka

In this article, we discuss how to develop a secure, scalable, messaging Java application with Kafka

Updated March 11, 2020

by Daniel Pereira

· 59,941 Views · 11 Likes

Develop a REST API Using Java and Jetty

In this tutorial, you will build a simple web service with Jetty embedded. After that, you will build the same web service in Spring Boot and Jetty.

Updated March 11, 2020

by Andrew Hughes

· 55,629 Views · 9 Likes

Immutability in JavaScript — When and Why Should You Use It

In this article, take a look at immutability in JavaScript and see when and why you should use it.

March 10, 2020

by Manjunath M

· 39,256 Views · 3 Likes

Unbounded Stream Processing Using Apache Beam

Today, we are going to build a simple WordCount data pipeline using Apache Kafka for unbounded sources.

March 9, 2020

by Sunil pandith

· 16,379 Views · 3 Likes

Compile Protocol Buffers Using Maven

This tutorial explains how to compile protocol buffers using Maven.

March 6, 2020

by Munander Singh

· 66,221 Views · 5 Likes

Spring Security — Chapter 1

In this article, see how to get started using Spring Security to manage authentication and authorization in a Java application.

March 5, 2020

by Vinu Sagar

· 17,742 Views · 20 Likes

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