Latest Java Tutorials

Code examples about modifying the JWT access tokens generated by Spring authorization server, including add, update and remove claims.

Guide to fully delete a standalone installation of IntelliJ IDEA from macOS

Guide to implement Spring authorization server with OAuth2 client credentials grant type and in-memory clients (users) with Java code examples. REST clients then call the authorization server to obtain new access tokens to access protected APIs and resources.

Solution to fix the error: The method applyDefaultSecurity(HttpSecurity) from the type OAuth2AuthorizationServerConfiguration has been deprecated

The complete guide to set up Java Development Kit (JDK) version 23 on Mac computers with OpenJDK 23 binary distribution.

The complete, step-by-step guide to download, extract, install, configure and verify Java Development Kit (JDK) on Windows with OpenJDK 23 binary distribution.

The complete step-by-step guide to install Java Development Kit (JDK) on macOS with Oracle JDK 23. Download Oracle JDK 23 installer for macOS from official source.

Check this step-by-step guide for setting up OpenSSL library and openssl command-line tool on Windows operating system.

Follow this step-by-step guide to set up Java Development Kit (JDK) on Windows operating system with Oracle JDK 23, so you can get started with Java programming.

This article helps you easily understand the basics and fundamentals of JSON Web Token (JWT) in REST API development: what JWT is, where it is used, the structure of a JWT, and some Java libraries that support working with JWT.

Guide to decode JWT (JSON Web Token) content using online JWT decoder tool, including verify JWT signature that is signed with secret key or public and private keys.

Understand the semantics, syntax and usage of the SpringMVC's @ResponseBody annotation with code examples in Java web application development with the Spring framework.

Read this post to gain better understanding of the @RequestBody annotation with code examples in Java web application development with Spring framework and Spring MVC.

Guide to use @RequestParam annotation in Spring MVC with real-word code examples and clear explanation

Check this guide for solutions for fix the error 'Unknown column XXX in field list' in Java development with Hibernate framework and JPA

Understand why and when to use the @Transient annotation provided Java Persistence API (JPA) with explanatory code examples

Understand Hibernate framework version history with important changes in each version series

Get to know the latest Jakarta Servlet version, and overview of history of Jakarta Servlet technology, which is a part of Jakarta EE platform. You'll also learn the notable changes in each version of Jakarta Servlet.

Version history and important changes of Java Servlet technology, from its first announcement to the day Java EE donated to Eclipse Foundation

Guide to handle exceptions thrown in a Spring filter class with four possible methods, with code examples and explanation for each method.