Merge pull request spring-projects#46818 from BenchmarkingBuffalo

* pr/46818:
  Polish "Fail fast with explicit error message for incompatible JDK version"
  Fail fast with explicit error message for incompatible JDK version

Closes spring-projectsgh-46818

Author: mhalbritter

buildSrc/build.gradle

@@ -22,6 +22,10 @@ plugins {
 	id "org.jetbrains.dokka" version "2.1.0"
 }
 
+if (!JavaVersion.current().isCompatibleWith(JavaVersion.VERSION_24)) {
+	throw new GradleException("This build requires Java 24 or newer to run, but you are currently using Java ${JavaVersion.current()}")
+}
+
 repositories {
 	mavenCentral()
 	gradlePluginPortal()