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Modern systems must be both fast and scalable. In this guide: ⚡ Java Performance Tuning Threading & concurrency Memory optimization Async processin
Mastering Spring Batch: A Deep Dive into ItemReader, ItemProcessor, and ItemWriter Learn how to effectively use Spring Batch ItemReader, I
I got tired of heavyweight frameworks, so I built my own web server in Java Most Java web projects start with Spring Boot. You add the depe
I built a centralized data orchestration engine for distributed Minecraft servers This post is about a real architectural problem I ran int
Hello Dev Community! 👋 I'm Phuc, a Backend Developer from Vietnam. Today, I want to share a bit about the project I've been working on: StayMaster –
Learn why to choose interface instead of abstract class in Java programming with simple examples, use cases, and best practices for beginners.
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