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Upgrading from Java 17 to 21 - Road to 21

Java via YouTube

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Overview

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This course explains changes to account for when upgrading Java applications from version 17 to 21, including API changes, deprecations, networking, encoding, runtime behavior, and tooling. It also discusses preparing Java and third-party updates using release notes and Quality Outreach resources.

Syllabus

Intro
API changes
Ongoing deprecations
The more you know
Networking
Encoding
Quality Outreach
Runtime
JDK Tools
3rd party updates
How to update
RoadTo21 previews

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Java

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