How to specify a minimal required Java update in Gradle? -

i'm building java fx application uses dialog classes added oracle jdk 1.8 in update 40. therefore, minimal required java version 1.8u40.

i want ensure version requirement in gradle build file. obviously, checking against major version with

assert org.gradle.api.javaversion.current().isjava8compatible() 

does not in case omits update number.

how specify contraint in build file?

taking account opal's suggestion following splits version string , checks against update number.

if (javaversion.startswith("1.8.0") && javaversion.split("_")[1].tointeger() < 40) {     throw new gradleexception("java version 1.8.0_40 or later required, $javaversion") }