Exception in thread "main" java.lang.UnsupportedClassVersionError ...

[AAdewunmi]

Hi,

I created a new SpringBoot project in SpringToolSuite4 and selected Java 11 as the perfered JDK.

However, Spring Initializr overrode my selection and created the project using Java 17.

Running the project produces the following error:

Exception in thread "main" java.lang.UnsupportedClassVersionError: org/springframework/boot/SpringApplication has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 55.0

Overriding selected JDK; Is this a bug?

[wilkinsona]

Spring Boot 3 requires Java 17. Please check the generated project's HELP.md file for details.

[AAdewunmi]

@wilkinsona thanks!

However, it would make sense to remove Java 19 / 11 / 8 from the UI, so users know Java 17 is the default.

[wilkinsona]

They can't be removed as they're supported with other versions of Spring Boot. spring-io/start.spring.io#250 is tracking some improvements in this area.

[AAdewunmi]

Ok 👍