Java Architecture Diary

Sep 30, 2021 · Backend Development

Why Upgrade from Java 8 to Java 17? A Practical Guide with Multi‑Release JARs

This article explains why upgrading from Java 8 to the LTS Java 17 is essential, outlines the changes and deprecations you’ll encounter, and provides step‑by‑step instructions—including multi‑release JARs, code examples, and tooling tips—to smoothly migrate your applications.