How specify the required Java version in a Gradle build

Question

I would like to set in a Gradle build file the required Java version e.g. 7 or 8 without having to specify the actual path to a local JDK installation.

Is

Answer 1

TLDR; Thanks @franklin-yu "targetCompatibility = '1.7' -> your user can compile with 8 and run with 7."

See Gradle, "sourceCompatibility" vs "targetCompatibility"?

targetCompatibility = '1.7' does the trick for e.g. Java 7

Use sourceCompatibility = '1.7' for the language level