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New Features in Java 25
1. Overview Java 25 is almost out! The new short-term release, scheduled for September 2025, introduces a comprehensive set of enhancements across the Java language, standard libraries, APIs, and...
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How to Fix Unknown Magic Byte Errors in Apache Kafka
1. Overview In this article, we’ll learn how to handle the “Unknown magic byte” error and other deserialization issues that arise when consuming Avro messages using Spring Kafka. We’ll explore the...
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Java Weekly, Issue 601
1. Spring and Java >> Jakarta EE 11 Delivers One New Specification, 16 Updated Specifications and Modernized TCK [infoq.com] Jakarta EE Working Group quitely released Jakarta EE 11 Release. Good...
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A Guide to Spring gRPC Project
1. Overview In this tutorial, we’ll explore how to utilize the Spring gRPC project to build a Spring application that includes a gRPC server. Using this project provides us with all the usual Spring...
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How to Use Apache Camel ProducerTemplate With Spring Boot
1. Overview Apache Camel allows us to implement different enterprise integration patterns in Java. It provides the ProducerTemplate interface, which enables us to send messages to the Camel route....
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Using Sequences in the H2 Database
1. Overview Our applications running in production usually support sequence-based primary key generation for efficiency and scalability. However, during development or testing, we often switch to...
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Implementing the Core Services of Spring Authorization Server with Redis
1. Overview The default implementation of Spring Authorization Server stores everything in memory. Things like RegisteredClient, Token stores, Authorization states, and more are all created and deleted...
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Pagination Support in Spring Boot GraphQL
1. Introduction GraphQL is a powerful query language that lets clients request exactly the data they need. One common challenge when working with APIs is handling large datasets efficiently. Pagination...
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Copying Text to the Clipboard in Java
1. Overview In this tutorial, we’ll discuss how to copy text to the system clipboard in Java. These methods aren’t limited to GUI applications; they’ll also apply to console applications. We’ll look at...
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Spring AI With Docker Model Runner
1. Introduction Docker Model Runner, introduced in Docker Desktop 4.40 for Mac with Apple Silicon (at the time of writing this article), revolutionizes local AI development by simplifying the...
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How to Unit Test MapStruct Generated Mappers
1. Introduction MapStruct is a powerful and sophisticated mapping library for Java projects. By following the convention-over-configuration approach, MapStruct enables developers to map large and...
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Chat Memory in Spring AI
1. Overview We often need human-like interactions when we have a conversation with an AI application. Therefore, there is a need to maintain the conversation with the LLM model, while Spring AI...
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Count the Number of Sign Changes in an Array
1. Overview In this tutorial, we’ll see two approaches to count the number of sign changes in an array. First, we’ll check a straightforward iterative algorithm that traverses the array and increments...
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Fixing Hibernate AnnotationException: Field Is a @ManyToOne Association and...
1. Overview In this short tutorial, we’ll shed light on how to fix the Hibernate exception: “AnnotationException: field is a @ManyToOne association and may not use @Column to specify column mappings...
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Writing Stored Procedures for H2 in Java
1. Introduction In this tutorial, we’ll learn how we can write stored procedures in Java for use with the H2 database engine. We’ll see what they are, how we can create them and how we can make use of...
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Securing Spring AI MCP Servers With OAuth2
1. Introduction MCP (Model Context Protocol) is an open standard, introduced by Anthropic, designed to let AI models interact with external tools, data sources, and services in a structured way. An...
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Java Weekly, Issue 602
1. Spring and Java >> RESTful API Guidelines [asimio.neto] Good practices when building a REST API. So many APIs don’t get this stuff right. >> Simplifying Java Runtime Setup in OCI Cloud...
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Create Array of Linked Lists in Java
1. Overview Some programming scenarios require grouping dynamic lists while still maintaining fast index-based access. An array of linked lists offers an effective solution by combining the...
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A Practical Guide to RecordBuilder in Java
1. Introduction Java records, introduced in Java 16, offer a concise way to model immutable data. They automatically generate constructors, accessors, equals(), hashCode(), and toString() methods,...
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Using Groq Chat with Spring AI
1. Overview In this tutorial, we’ll learn to use Spring AI to integrate with Models offered by the LPU-based Groq AI inference engine, building a chatbot. Groq exposes REST APIs that applications can...
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