How Can I Customize the JDK Version for My Gradle Builds?

Customizing JDK for Gradle Builds

Gradle provides flexibility in specifying the JDK version to use during build operations. There are several approaches to achieve this customization.

Regarding the desire to define a variable in gradle.properties or a system environment variable, it is possible to leverage Gradle's system property mechanism. In your build.gradle file, you can access the environment variable or property using:

System.getProperty("JAVA_HOME_FOR_MY_PROJECT")

Within the build script, you can then set the JAVA_HOME environment variable using a System property:

System.setProperty("JAVA_HOME", "${javaHome}")

Another option is to use Gradle's dedicated org.gradle.java.home property in gradle.properties:

org.gradle.java.home=/path_to_jdk_directory

This property directly sets the JAVA_HOME for Gradle.

If you wish to locally modify the JAVA_HOME variable for the build process only, you can use Gradle's fork options to specify a custom Java executable:

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

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