[java] How do I tell Gradle to use specific JDK version?

I can't figure out to get this working.


  • I have an application built with gradle
  • The application uses JavaFX

What I want

  • Use a variable (defined per developer machine) which points to an installation of a JDK which will be used for building the whole application / tests / ...

I thought about having the gradle.properties file, defining the variable. Something like

JAVA_HOME_FOR_MY_PROJECT=<path to my desired JDK>

What I don't want

  • point JAVA_HOME to the desired JDK

I could live with many suggestions:

  • a solution that defines a system environment variable which I'm able to check in my build.gradle script
  • a variable defined in gradle.properties
  • overriding the JAVA_HOME variable only for the build context (something like use JAVA_HOME=<my special JDK path defined somewhere else defined>)
  • something else I didn't think about


  • How to wire a variable (how ever defined, as variable in the gradle.properties, system environment variable, ...) to the build process?

I have more than one JDK7 available and need to point to a special version (minimum JDK_u version).

Any answer is appreciated and I'm thankful for every hint to the right direction.

This question is related to java gradle build.gradle

The answer is

Two ways

  1. In gradle.properties in the .gradle directory in your HOME_DIRECTORY set org.gradle.java.home=/path_to_jdk_directory


  1. In your build.gradle

     compileJava.options.fork = true
     compileJava.options.forkOptions.executable = '/path_to_javac'

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