juniorSpring
What is SpringApplication.run()?
Updated May 17, 2026
Short answer
It bootstraps and launches a Spring Boot application.
Deep explanation
It initializes ApplicationContext, starts embedded server, and triggers auto-configuration.
Real-world example
Starting a microservice as a standalone JAR.
Common mistakes
- Trying to manually configure context after run().
Follow-up questions
- What happens internally in run()?
- Can we customize startup behavior?