Java Resources

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

· 4,304 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

· 12,697 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

· 11,990 Views · 6 Likes

Azure Spring Cloud: A Comprehensive Overview

Learn about Azure Spring Cloud and its main features quickly and with ease in order to build, deploy, scale, and manage your applications in the cloud.

October 9, 2020

by Domenico Sibilio

· 9,545 Views · 2 Likes

How JPAstreamer Can Help You Write Type-Safe Hibernate Code Without Unnecessary Complexity

Learn how to use Hibernate in a type-safe manner without unnecessary complexity using standard Java Streams.

October 9, 2020

by Mislav Milicevic

· 9,742 Views · 7 Likes

Use Both JWT and Opaque Access Tokens With Spring Boot

This article will introduce how to build a simple application that can validate JWTs remotely or locally based on the specific use case.

October 9, 2020

by Brian Demers

· 16,978 Views · 6 Likes

Building a REST API With Quarkus

Focusing on fast start-up times and low memory usage making it more suitable to run within container orchestration platforms like Kubernetes.

Updated October 8, 2020

by Dan Newton

· 13,383 Views · 9 Likes

Java Spring OAuth2 and Basic Auth Support

The goal of the post is to share an idea of how can we provide the basic authentication and OAuth 2 authentication for the APIs.

October 7, 2020

by Kanifnath Gaikwad

· 20,298 Views · 4 Likes

Kafka Security With SASL and ACL

Tutorial covering authentication using SCRAM, authorization using Kafka ACL, encryption using SSL, and using camel-Kafka to produce/consume messages.

October 6, 2020

by Ramu kakarla

· 41,412 Views · 2 Likes

Oracle Database Link and Hibernate Mapping

The article is to describe how to create a Database link in Oracle and use Hibernate to create mapping for the remote table.

October 6, 2020

by Eason YIN

· 7,068 Views · 3 Likes

Facade Design Pattern In Java

Here I am with another article on design patterns. A Facade object is use to provide a simple interface by hiding complexities of a complex system.

October 6, 2020

by Brijesh Saxena

· 11,672 Views · 8 Likes

CRUD Operations on Deeply Nested Comments: Scalable Spring Boot and Spring Data approach

In this post, I present CRUD operations on deeply nested comments, stored in a relational database via Spring Boot and Spring Data. The approach is scalable but uses only JPQL and very few pessimistic locks.

October 6, 2020

by Alexander Eleseev

CORE

· 6,919 Views · 1 Like

Charsets and Unicode Identifiers in Java

Ever wanted to know exactly how characters and character sets work within a programming language? Check out this comprehensive article for more!

October 6, 2020

by Pravin Jain

· 12,724 Views · 5 Likes

Determining a File Type In Java

See some of the best tools that Java has to offer for determining file types within an application, including Apache Tika.

October 5, 2020

by Ercan Zengin

· 35,029 Views · 3 Likes

Abstract Factory Pattern In Java

In this article, I will try to highlight the usage of the Abstract Factory Pattern along with the difference with the Factory Pattern.

October 5, 2020

by Brijesh Saxena

· 11,783 Views · 8 Likes

InOrder Traversal Algorithm in Java

In this article, you will learn what is inorder traversal algorithm and how you can use it to print nodes of binary tree in sorted order in Java.

October 5, 2020

by Javin Paul

· 11,267 Views · 3 Likes

How to Convert XLSX to CSV in Java

Convert any Excel document to CSV with support for both XLSX and XLSB file formats, as well as legacy formats such as XLS.

October 5, 2020

by Brian O'Neill

CORE

· 13,207 Views · 3 Likes

How to Merge PDFs in Java

Combine two or more PDF files (pdf) into a single PDF document, preserving the order of the input documents in the combined document

October 5, 2020

by Brian O'Neill

CORE

· 4,641 Views · 2 Likes

Write a Kafka Producer Using Twitter Stream

With the newly open sourced Twitter HBC, a Java HTTP library for consuming Twitter’s Streaming API, we can easily create a Kafka twitter stream producer.

Updated October 5, 2020

by Saurabh Chhajed

· 39,264 Views · 13 Likes

Building an Amazon-Like Recommendation Engine Using Slash GraphQL

Get started using Dgraph's Slash GraphQL product and connect to a Spring Boot application which will act as a simple RESTful recommendation service

October 5, 2020

by John Vester

CORE

· 112,974 Views · 12 Likes

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