My example of gradle file

build.gradle

import java.time.*

task helloWorld {
	description = 'My hello world'
	doLast {
    	println "Hello World"	
	}
}

task printDate {
	description = 'Print date'
	doLast {
		println new Date()
		println LocalDateTime.now()
	}
}

You can run it by type

gradle hW
gradle pD