Programming Tutorials

Problems where we can use two pointers i,j to get to a solution in the given Array or String Example : Two Sum II Input Arrays is Sorted Here we have

What are the benefits of a pure Java PDF library and why does it matter? PDF processing sits at the core of many enterprise systems, and th

The Brutal Truths of "Write Once, Run Anywhere" After 3 Months with Capa-Java Honestly, I have to admit something embarrassing: I fell for

Clean Code Principles for Java Developers Learn how to write clean, maintainable, and efficient Java code by following established princip

You're staring at your assignment deadline, watching your Spring Boot API throw endless connection errors to your MySQL database. You’ve checked your

The Brutal Truths of Building "Write Once, Run Anywhere" Java Apps After 3 Months Introduction Honestly, when I first discovered

In enterprise applications, working with Excel files is a common requirement. Whether it’s financial reporting, sales analysis, or data consolidation,

Most beginners try to memorize DSA problems. But interviews don’t test memory — they test patterns. If you master just these 3 array problems, you’

Three years ago, I walked into a hackathon at Ctrip with nothing but coffee and anxiety. Forty-eight hours later, we walked out with a gold medal and

The HTTP Client Showdown Every Spring Developer Needs to Understand If you've been writing Spring applications for a while, you've probably had this

The Brutal Truth About "Write Once, Run Anywhere" After 3 Months with Capa-Java Honestly, when I first heard about Capa-Java and its "write

A matching engine that only supports limit and market orders is a toy. Real exchanges need orders that expire, orders that demand all-or-nothing execu

Your microservice calls an external API. It fails. You add Resilience4j. Now you have 10 transitive dependencies, a 500KB JAR, 3 config classes, and

The 2nd Attempt: When Your Hybrid Cloud Dream Meets the Brutal Reality of Production Honestly, I thought I'd cracked the code. After months

Day 1/75: Java DSA environment setup 75 Day DSA in Java Challenge Today I focused on building a Java setup that makes daily DSA work fast

Querier, a type-safe Java SQL query builder using method references for compile-time safety. Querier helps teams build readable SQL queries with suppo

Day 1/90: Java setup & environment 90 Day Java Challenge: Zero to Production Today I wanted java setup & environment to feel like a real e

The Brutal Reality of Using Capa-Java for Hybrid Cloud After 6 Months: A Developer's Honest Journey Alright folks, let me tell you a story.

The Brutal Truth About Using Capa-Java for Hybrid Cloud: A 3-Month Reality Check Honestly, I was so excited when I first discovered Capa-Ja

Your Virtual Threads Are Leaking: Why ScopedValue is the Only Way Forward. If you're spinning up millions of Virtual Threads but still clin