This video demonstrates how to upgrade Java applications using Amazon Q Code Transformation. The AI-powered assistant analyzes legacy Java projects, generates a transformation plan, and executes upgrades from Java 8 and 11 to version 17. The process is showcased using IntelliJ IDE, where a sample project is transformed from Java 1.8 to 17. The video highlights the automated analysis, plan creation, and code updating steps, significantly reducing the time required for language upgrades. It also shows how to review and accept changes, update dependencies, and successfully compile and test the upgraded project.