From Java 8-11 to Java 21-27 — Benefits, Challenges, and a Practical Migration Path

Japanese Edition
https://daisuke.masuda.tokyo/article-2026-19-18-1954

This deck guides migration from Java 8/11 to Java 21/25/27. It identifies Java 25 as the latest LTS and Java 27 as non-LTS; separates runtime, build, dependency, framework, and code changes; and covers compatibility testing, rollout, rollback, and the Tomcat 9 javax versus Tomcat 10.1/11 jakarta transition.

Transcript