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How to Read Data from a CSV File and Convert to ArrayList in Java
Reading data from a CSV file is a common task in Java programming. In this post, we’ll learn how to…
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Spring Boot Interview – Return JSON and XML from the Same Endpoint (Interactive Q&A)
Let’s simulate a Java/Spring Boot interview where the topic is producing both JSON and XML responses from a REST endpoint. Here’s how…
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Serialization vs Externalization in Java – Explained with Interview Q&A Style
Let’s say you’re in a Java interview and the topic of object persistence comes up. Here’s how an interactive interview-style…
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Singleton Class in Java – Interview Questions with Simple, Interactive Answers
Let’s imagine you’re in a Java interview, and the interviewer is asking you about the Singleton design pattern. Here’s how…
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Object Comparison in Java
Why Object Comparison Matters In Java, when comparing objects, we often expect two objects with the same content to be…
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Java Loops
Introduction Loops in Java allow executing a block of code multiple times based on a condition. There are three main…
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Java Arrays and Chatbot Applications
📌 Introduction This document covers Array Concepts and Chatbot Applications in Java. 1️⃣ Basic Array Concept What is an Array? An array is a data structure…
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Exception Handling in Java
Exception handling in Java is a mechanism to handle runtime errors so that the normal flow of a program is…
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Resolving “Failed to Configure a DataSource” Error in Spring Boot
Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured Problem: If you’re…
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@Qualifier in Spring Boot: Handling Multiple Implementations
In Spring Boot, when you have multiple implementations of an interface, the framework might get confused about which implementation to…
Rohit Yadav
A passionate software developer who loves exploring and writing about Java, Spring Boot, Docker, and all things backend. This blog is where I share tutorials, tips, and real-world solutions to help fellow developers level up their skills
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- Spring Boot (7)