-
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…
-
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…
-
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…
-
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…
-
Object Comparison in Java
Why Object Comparison Matters In Java, when comparing objects, we often expect two objects with the same content to be…
-
Java Loops
Introduction Loops in Java allow executing a block of code multiple times based on a condition. There are three main…
-
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…
-
Exception Handling in Java
Exception handling in Java is a mechanism to handle runtime errors so that the normal flow of a program is…
-
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…
-
@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…