Month: March 2025

🚀 Introduction Picture this: your API responds with 200 OK after a client requests a report, but the report is still being generated. The frontend assumes it's ready—but nothing shows…

1. Introduction Enhancement You can make the introduction more engaging with a quick hook: With the arrival of Spring Boot 3 and Spring Framework 6, best practices in dependency injection…

Introduction When working with relational databases in Spring JPA, you’ll often need to insert data into multiple related tables—for example, creating a new User along with a corresponding Transaction (like…

Introduction Ever tried using an expression like (st.totalMargin / st.totalRevenue) in your ORDER BY clause, only to have Spring Data JPA throw an error? You’re not alone. This common issue…

Introduction Running a Spring Shell application in your IDE, but it shuts down right after startup? You’re not alone. This issue is especially common in environments like IntelliJ IDEA, Eclipse,…

Are you preparing for coding interviews and struggling with LeetCode Problem 5: Longest Palindromic Substring? In this post, you'll learn a step-by-step dynamic programming solution in Java to efficiently solve…

Introduction When building REST APIs, clear and consistent error handling is key to delivering a great developer experience. Spring Boot does offer basic error handling out of the box—but let's…

Introduction Spring Security is essential for securing modern Java applications, but its exceptions can feel cryptic if you’re not prepared. Whether it's failed logins or unauthorized access, each exception comes…