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Explore Spring Boot 4.0's new features and improvements in this 49-minute conference talk from Devoxx. Learn how to upgrade existing applications to Spring Boot 4.0 while maintaining Java 17 as the baseline. Discover how to prevent NullPointerExceptions in production using Nullness metadata in Spring projects and JSpecify Nullability checks. Examine the restructured application dependency arrangement with Spring Boot's new fine-grained dependencies that offer greater flexibility. Master the new Jackson 3.0 integration that simplifies Jackson setup and introduces modern configuration options. Understand how to implement RestClient in asynchronous scenarios without requiring Reactive types. Follow along as Brian Clozel and Stéphane Nicoll demonstrate practical upgrade strategies and showcase the enhanced capabilities available in this major Spring Boot release.
