A step-by-step guide to containerizing a Java 26 Spring Boot project using Docker Init, the interactive wizard introduced in Docker Desktop 4.27. Docker Init automatically generates a multi-stage Dockerfile, compose.yaml, .dockerignore, and README. The guide covers project setup via Spring Initializr, running docker init, understanding the generated four-stage Dockerfile (dependency resolution, compilation, Spring Boot layer extraction, and minimal runtime image with a non-root user), and a workaround for Java 26 base images using SAP Machine instead of Eclipse Temurin while the latter catches up. A simple REST controller is added to verify the running container.

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Technical RequirementsCreate a New ProjectRun Docker InitA Note on Java 26 Base ImagesBuild and RunAdd a ControllerMore LinksConclusion

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