Dynzen

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Dev

Installing JDK 25 on macOS feat. Amazon Corretto 25

A complete guide to installing Amazon Corretto 25 on macOS via Homebrew. Dynamic JAVA_HOME setup, aarch64 verification, and the hardcoding pitfall that breaks your setup on the next patch update — all from firsthand experience.

Tech

[Spring Boot Migration] From 2.7 to 4.0: A Phased Migration Strategy

A practical guide to migrating Spring Boot from 2.7 to 4.0. Covers why skipping straight to 4.0 is a trap, how to navigate the Jakarta EE chasm, and why the best code is the code you get to delete.

Tech

[Oracle Cloud #2] VCN First Fixes Public IP! But Then... Out of Capacity

Creating a VCN before the ARM instance solved the Public IP toggle issue on Oracle Cloud. But after setting boot volume to 200GB and hitting Create, I was met with an Out of host capacity error.

Tech

[Oracle Cloud #1] Setting Up a Free ARM Server on Oracle Cloud: 4 Cores, 24GB RAM for Free?

A detailed walkthrough of creating an ARM (Ampere) instance on Oracle Cloud's Always Free tier. Includes an AMD vs ARM comparison, step-by-step setup guide, and why I had to stop mid-creation due to a Public IP configuration issue.

[AdSense #5] Finally Approved! Success on the Second Try

My real experience of getting Google AdSense approval on the second attempt after the first rejection, with consistent content creation and a detailed timeline.

DIY

[DIY Wall Condensation Fix #3] Repair Complete: Finishing with Daiso Wallpaper

After ensuring the foam repair was fully dry, I finished the job with cost-effective Daiso wallpaper. Sharing the final results and current condensation status.

Tesla

[Tesla Model Y Accident #4] Repair Complete! Welcome Back Model Y: Picking up from Dongtan Service Center

After 3 weeks of waiting, I finally got my Model Y back from the Dongtan Service Center. Sharing the pickup process, my thoughts on the restoration, and the lessons learned from this accident.

DIY

[DIY Fix for Winter Wall Condensation #2] It Ain't Over Till It's Over: Round 2 vs. Condensation

Condensation returned just 3 days after the first fix. This is my second attempt—following a suspicious hollow sound to hunt down the hidden air path and seal it for good.

[AdSense #5] Transfer USD from Hana Million Dollar Account to Mirae Asset Securities, No Fee

Step-by-step guide to transferring foreign currency (USD) from Hana Bank Million Dollar Account to Mirae Asset Securities linked foreign currency account with no transfer fee.

DIY

[DIY Fix for Winter Wall Condensation #1] Dew on the Wall? My First Encounter with the Cold Draft

A peaceful winter day turned into a DIY disaster when I found dew(?) forming on my wallpaper. This is the story of how I decided to ignore the experts and fix the condensation myself.