How to check java version when running gradle?

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If you put the check very early in your build lifecycle (plain check in the beginning of your build.gradle file or in the apply method of a plugin) you shouldn’t see any tasks executed.

you can use JavaVersion enum for that which is part of the gradle api:

if(JavaVersion.current() != JavaVersion.VERSION_1_8){
    throw new GradleException("This build must be run with java 8")
}

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