Script and Tasks
As the title suggests, this is the JDK which is used for Gradle projects by default. Also the editor will assume that this JDK is on the classpath of the .gradle files. You should probably set this one to the highest version of JDK available to you. Note, that you might override this property in the project settings.
You might add arguments applied to each and every Gradle task execution (even loading projects). The main reason for this setting, is that you may specify "--offline" when working without access to your remote repositories.
You might add JVM arguments applied to each and every Gradle task execution (even loading projects). The intended purpose is to specify memory constraints for the JVM (e.g.: "-Xmx512m").