Java Resources

The G1 garbage collector, despite its advantages, is currently not good at handling bigger objects, called Humongous. Learn how to diagnose and fix the problem.

October 20, 2020

by Misha Dmitriev

· 15,345 Views · 15 Likes

Minions in Minikube - A Kubernetes Intro for Java Developers

Java developers, it would be despicable not to take a look at this cute project that will give you a hands-on introduction to Kubernetes.

Updated October 20, 2020

by Ryan Dawson

· 15,566 Views · 20 Likes

Configuring Java Apps With Kubernetes ConfigMaps and Helm

This tutorial will show you how to develop Java microservices that use ConfigMaps, see how ConfigMaps are used, and update them in the app.

Updated October 20, 2020

by Ryan Dawson

· 82,758 Views · 18 Likes

Composite Design Pattern in Java

Want to learn more about the composite design pattern in Java? Take a look at this tutorial to learn how to implement this design pattern in your project.

Updated October 20, 2020

by Brijesh Saxena

CORE

· 63,264 Views · 18 Likes

How to Scan a Barcode Image in Java

Use an API to scan or look up a barcode. Supported barcode types include AZTEC, CODABAR, CODE_39, CODE_93, CODE_128, DATA_MATRIX, EAN_8, EAN_13, ITF, MAXICODE, PDF_417, QR_CODE, RSS_14, RSS_EXPANDED, UPC_A, UPC_E, All_1D, UPC_EAN_EXTENSION, MSI, PLESSEY, and IMB.

October 20, 2020

by Brian O'Neill

CORE

· 11,571 Views · 1 Like

State Design Pattern In Java

State Design Pattern — a behavioral design pattern that allows an object to change its behavior when its internal state changes.

October 19, 2020

by Brijesh Saxena

CORE

· 5,229 Views · 6 Likes

Tracking Changes in MongoDB With Scala and Akka

Leverage change streams feature in MongoDB to get every change occurring in real-time.

Updated October 16, 2020

by Hubert Skowronek

· 8,777 Views · 4 Likes

How to Merge DOCX Files and Replace Text Strings in Java

Combine multiple Office Word Documents (docx) into a single document; Instantly find and replace specific text string variables like names and dates.

October 15, 2020

by Brian O'Neill

CORE

· 9,111 Views · 3 Likes

Builder Design Pattern in Java

The Builder design pattern is designed to provide a flexible solution to various object creation problems in object-oriented programming.

Updated October 15, 2020

by Brijesh Saxena

CORE

· 10,536 Views · 8 Likes

Project Reactor — Reactive Programming With Spring, Part 2

I will provide an overview of Project Reactor, a reactive library based on the Reactive Streams specification.

October 15, 2020

by Anna Eriksson

· 37,138 Views · 20 Likes

How to Use Spring Cloud Gateway With OAuth 2.0 Patterns

This article will show you how to use Spring Cloud Gateway for routing as well as traditional Servlet API microservices.

October 15, 2020

by Jimena Garbarino

· 31,061 Views · 3 Likes

Anti-Virus and 0-Day Threat Protection for Java Web Applications

With APIs predicted to become the focus for future cyberattacks, it's improtant to protect your Java applications from attacks from day one.

Updated October 15, 2020

by Brian O'Neill

CORE

· 18,523 Views · 4 Likes

Consumer-Driven Contract Testing With Spring Cloud Contract

Implement CDC testing with Spring Cloud Contract and two sample Spring Boot applications to understand the communication between microservices.

Updated October 15, 2020

by Jagdish Raika

· 15,346 Views · 3 Likes

Build J2EE Microservices Architecture

This post will cover the following aspects: Keycloak setup, Eureka service registration and discovery, Spring Cloud API gateway, and more!

October 15, 2020

by Kunkka Li

· 7,285 Views · 4 Likes

Selenium Grid 4 Tutorial For Distributed Testing

Selenium Grid is packed with features for Selenium test automation, this Selenium 4 tutorial will guide you in performing Distributed Testing.

October 14, 2020

by Himanshu Sheth

CORE

· 13,830 Views · 8 Likes

Learning by Doing: How to Learn Java Basics by Building Your Own Project

If you are reading this blog post, you might also be the one who wants to learn Java. Ain’t I wrong?

October 13, 2020

by John Selawsky

· 10,626 Views · 2 Likes

Visitor Design Pattern In Java

The Visitor design pattern lets us separate algorithms from the objects on which they operate. See how to implement it to follow the open/closed principle.

October 13, 2020

by Brijesh Saxena

CORE

· 7,583 Views · 16 Likes

Moving Toward Inline Classes: JEP 390 and the @ValueBased Annotation

Candidate JEP 390 ("Warnings for Value-Based Classes&") was announced this past week by Mark Reinhold on the OpenJDK jdk-dev mailing list. This is a JDK Enhan...

October 13, 2020

by Dustin Marx

· 3,950 Views · 1 Like

Observer Design Pattern In Java

Observer Pattern maintains a one-to-many dependency between a Subject and its dependents so that when the state of the Subject changes, dependents get notified.

October 12, 2020

by Brijesh Saxena

CORE

· 12,080 Views · 4 Likes

Iterator Design Pattern In Java

The Iterator Pattern is a relatively simple behavioral design pattern that provides a simple way to iterate through the collection of objects.

October 12, 2020

by Brijesh Saxena

CORE

· 11,353 Views · 5 Likes

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