Java & Kotlin

47+ min ago   (783+ words) The uncomfortable part of a failed payment flow is not always the error. Sometimes the function returns an error and the database still keeps half of the work. That is the failure Lab 03 demonstrates. A payment is inserted. The order…...

3+ day, 7+ hour ago   (920+ words) "I'll upgrade once things settle down"—I think many engineers feel this way. However, the world of Spring Boot is moving faster than you might think. Spring Boot 3.5 series already reached EOL (End of Life) on June 30, 2026. And the next…...

5+ hour, 26+ min ago   (188+ words) In Java, a compact source file is a feature finalized in Java 25 (via JEP 512) that allows you to write a launchable Java program without explicitly declaring a class or a public static void main method. It is designed to minimize…...

6+ hour, 2+ min ago   (1676+ words) This week was another productive part of my #100DaysOfCode journey, with a mix of learning, revision, and building. I started the week by going deeper into software testing with JUnit 5, exploring advanced features such as dynamic tests, parameterized tests, test templates,…...

6+ hour, 55+ min ago   (814+ words) Last week TypeSafe AI released Jev, a "System One" model that does something no LLM does: it refuses to talk. You send it a state (any text or JSON) plus typed questions, and it returns typed answers with calibrated probabilities....

3+ day, 13+ hour ago   (453+ words) TypeSafe AI is challenging the industry’s reliance on large language models for every stage of the agentic stack with the launch of Jev, a specialized “System One Model” designed exclusively for structured decision-making. By abandoning the generative capabilities of LLMs…...

6+ hour, 54+ min ago   (775+ words) La mayoría de sistemas usan un LLM para decidir cosas como clasificar, priorizar o enrutar. jev está diseñado específicamente para tomar esas decisiones. En lugar de generar texto, evalúa un estado y devuelve una decisión tipada junto con las probabilidades…...

8+ hour, 54+ min ago   (709+ words) I spent the last few months building an MPC-style pad sampler and looper for Android in Flutter. The UI was the easy part. The part that ate the time was audio — specifically, all the ways audio quietly breaks on a…...

9+ hour, 49+ min ago   (829+ words) A process has its own memory space and OS resources; threads live inside a process and share its heap and file handles but keep their own stack and program counter. That shared memory is exactly why threads are cheap to…...

10+ hour, 27+ min ago   (974+ words) ParparVM fixes pathological map misses and extends tagged boxed values. Probe counts, allocation coverage, and regressions show where ordinary Java collections became cheaper. Tagged with java, mobile, android, ios....