Programming Tutorials

What is File Handling? File Handling in Java is the process of creating, reading, writing, updating, and deleting files stored on a storage

Stop Blocking Virtual Threads: Building Asynchronous Human-in-the-Loop AI Agents with Spring AI In 2026, letting autonomous AI agents execu

One number in the array appears twice, while another number from the range [1, n] is missing. Our task is to find both: Repeating Number (A) Missin

Problem Statement Given an array nums containing n + 1 integers where: Each integer is in the range [1, n] There is only one repeated nu

At first glance, this problem looks like a standard merge operation from Merge Sort. Most candidates immediately think about creating a temporary arr

Java remains one of the most sought-after programming languages in Bangalore's IT industry. But learning Java is not enough – employers want proof of

Hey everyone! This is my first post and I wanted to start sharing this project with you all. I've been experimenting with audio embeddings recently

One of the most common interval-based interview questions is Merge Intervals. At first glance, it looks like a simulation problem, but the real trick

Spring Boot 4 just shipped with native Jackson 3 support. Good moment to revisit how much Java we write when we work with JSON. If you've built a Spr

When I started learning Spring Security, I kept seeing two terms everywhere: Authentication and Authorization At first, they sounded almost the same

I Built a Vector Search Engine from Scratch — Here's What I Learned Implementing HNSW (Hierarchical Navigable Small World) graphs, hybrid

Matrix problems often seem tricky because multiple rows and columns move at the same time. In this problem, we need to rotate an n × n matrix by 90 de

Introduction In Java, constructors are used to initialize objects, while packages are used to organize classes and interfaces. Both concept

What is a Constructor? A Constructor is a special method in Java that is automatically called when an object is created. It is used to initialize ob

If your React Native or Expo Android compilation suddenly crashes with a massive terminal stack trace pointing to an "unsupported class file major ver

AI is the most significant shift in software development since the internet. Not because it changes what software can do — but because it accelerates

Android Toast messages are one of the simplest ways to show quick feedback to users. But the default Android Toast often feels too basic when you a

What is a Method: A method is a block of code that performs a specific task. The code inside the method executes only when the method is called.

When I first added Spring Security to my Spring Boot project, something surprising happened. All my APIs were suddenly protected, and I could no longe

Concurrent programming allows running multiple tasks simultaneously, and was historically achieved mostly through threads. However, they are harder to