https://rg9.dev/My personal blog about software development 2026-07-11T17:04:28+02:00 Rafał Garbowski https://rg9.dev/ Jekyll © 2026 Rafał Garbowski /assets/img/favicons/favicon.ico /assets/img/favicons/favicon-96x96.png 2026-06-30T00:00:00+02:00 2026-06-30T00:00:00+02:00 https://rg9.dev/posts/automate-copying-text-from-browser/ Rafał Garbowski

We all have those tiny repetitive tasks that take only a few seconds but somehow add up over time. For me, one of them is copying GitHub issues into my Obsidian notes. I usually want the following Markdown format: [Issue title](https://github.com/org/repo/issues/123) Doing this manually means selecting the title, copying it, copying the URL, and formatting everything. Not difficult—just rep...

2026-05-31T00:00:00+02:00 2026-05-31T00:00:00+02:00 https://rg9.dev/posts/ocp-17-exam-passed/ Rafał Garbowski

I finally passed the OCP 17 exam! 🎉 Link to badge It took me about 1.5 years from start to finish, with plenty of shorter and longer breaks along the way. 😉 Looking back, I think I could have spent less time reading the OCP Study Guide and more time solving practice questions. However, one of my motivations for reading the book was to start an OCP book club at work. I didn’t complete all th...

2026-04-30T00:00:00+02:00 2026-04-30T00:00:00+02:00 https://rg9.dev/posts/ocp17-exam-pitfalls/ Rafał Garbowski

🧠 1. Think Like the Compiler, Not Like a Developer As developers, we naturally focus on business logic. The compiler doesn’t. It doesn’t care that your algorithm is correct if: a variable is declared twice, a local variable isn’t initialized, you’re calling an instance method from a static context, an abstract class is instantiated, an overrid...

2026-03-31T00:00:00+02:00 2026-03-31T00:00:00+02:00 https://rg9.dev/posts/why-ocp-17-in-2026/ Rafał Garbowski

Last year I spent a lot of time reading the OCP study guide. I don’t want to leave it unfinished, so my goal for 2026 is to finally pass the exam. These are my reasons. 🧠 I want to finish what I started I already spent many hours reading the book and solving questions. It would be nice to finish this journey. 🧱 I want to organize my Java knowledge The exam covers many Java topics. Some of ...

2025-11-29T00:00:00+01:00 2025-11-29T00:00:00+01:00 https://rg9.dev/posts/ocp-17-exam-chapter-15/ Rafał Garbowski

Java provides JDBC interfaces, while database libraries provides implementations - except implementation of DriverManager, which is used to create connection (Q.1) if autocommit is enabled (default), then commit happens after every statement (Q.6) if nothing to rollback (changes has been commited), then rollback doesn’t throw any Exception (Q.6) rollback will throw if you try to rollback ...