Spring Boot 4.0 is landing next November on a Java 17 baseline, and Brian & Stéphane are upgrading an existing app to show off all the new features.
Along the way they’ll banish NullPointerExceptions using Spring’s Nullness metadata and JSpecify checks, switch to fine-grained dependencies for extra flexibility, simplify JSON handling with Jackson 3.0’s modern defaults, and even demo async RestClient calls—no reactive types required.
Watch on YouTube
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