Testcontainers JDBC Support
Testcontainers is a powerful library designed to simplify the testing of database interactions, especially when dealing with different environments and configurations. It enables the creation and...
View ArticleEnhancing Java Objects with the Decorator Design Pattern
The Decorator design pattern is a structural pattern that provides a flexible way to add new behaviors to objects dynamically without modifying their existing code. This pattern is particularly useful...
View ArticleJPA Inheritance vs Composition Spring Boot Example
1. Introduction Inheritance is an “IS-A” type of relationship in object-oriented programming (OOP). Inheritance is tightly coupled since child classes extend from the parent class. JPA...
View ArticleUsing Spring AI Structured Output: List, Map, and Bean Converters
In Spring AI, structured output converters play a crucial role in handling the responses returned by AI models. Specifically, MapOutputConverter, ListOutputConverter, and BeanOutputConverter are...
View ArticleHamcrest Collection hasItem() Example
In Java, it’s common to check whether a collection contains a specific element. This is a frequent task in testing scenarios, especially when using testing frameworks like JUnit. Hamcrest, a popular...
View ArticleEnhancing Spring Boot Controllers: Custom Parameters
Spring Boot, a popular framework for building Java-based applications, offers a robust and efficient way to create RESTful APIs. One of the key components of these APIs is the controller, which handles...
View ArticleVerify List Elements with Specific Properties Using Hamcrest
Hamcrest is a powerful framework used for writing matcher objects, which are helpful when writing tests in Java. One common scenario in testing is checking if a list contains elements that have...
View ArticleMastering Jackson’s @Json Annotations: A Developer’s Guide
Jackson is a popular Java library for handling JSON data. It provides a rich set of annotations that can be used to customize the serialization and deserialization process. In this article, we’ll...
View ArticleNaming Executor Service Threads and Thread Pool in Java
In Java, ExecutorService is a framework that provides a way to manage and control thread execution. It helps in creating a pool of threads that can be reused for executing tasks. By default, the...
View ArticleJUnit AutoClose Extension Tutorial
Junit 5 has brought numerous enhancements and new features to the table, making unit testing more powerful and flexible. One of these features is the ability to create custom extensions that allow...
View ArticleManually Destroy Prototype Spring Bean
In Spring Framework, beans can be defined with different scopes. The most common scopes are singleton and prototype. While singleton beans are managed by the Spring container for their entire...
View ArticleIncompatibleClassChangeError in Java
The IncompatibleClassChangeError is a runtime exception in Java that occurs when a class undergoes an incompatible change after it has been compiled. This error usually indicates that there’s a...
View ArticleSpring Boot and SOLID: A Perfect Match
Spring Boot, a popular Java framework for building microservices and web applications, has gained immense popularity due to its simplicity, convention over configuration approach, and rapid development...
View ArticleApache Fury Serialization Java Example
Serialization is a crucial process in software engineering that enables efficient storage, retrieval, and transmission of data structures or objects across systems. Apache Fury is designed to provide...
View ArticleH2 Production Database Features & Limitations
H2 is an in-memory Java SQL database, lightweight, fast, and often used for development and testing environments. However, there are several considerations to take into account when deciding whether H2...
View ArticleMaster LeetCode with These 10 Proven Patterns
LeetCode is a popular platform for practicing coding problems and preparing for technical interviews. While many find LeetCode challenging, understanding common problem-solving patterns can...
View ArticleUnderstanding the Bridge Design Pattern in Java: A Simplified Guide
The Bridge Design Pattern is a structural design pattern that decouples an abstraction from its implementation, allowing both to evolve independently. It helps create flexible and scalable code by...
View ArticleSpring AI Structured Output Example
Spring AI offers a seamless integration for AI-driven applications, especially when interacting with large language models (LLMs). One key feature is the ability to generate structured outputs,...
View ArticleGuide to FileOutputStream vs. FileChannel
In Java, file handling is crucial for reading from and writing to files. Two common classes used for output operations are FileOutputStream and FileChannel. Let us delve into the differences between...
View ArticleSpring Validator Validation Example
1. Introduction Spring Validation Framework includes the Validator interface that handles data validation. It is used to implement custom validation logic. In this example, I will create a Spring MVC...
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