Trying to set the destinationDir property of a Jar task

build.gradle

//Trying to set the destinationDir property of a Jar task with a string
jar {
  destinationDir = 'build/jar'
}
//Trying to set the destinationDir property of a Jar task with a string
jar {
  destinationDir = new File('build/jar')
}
//Setting the destinationDir property of a Jar task using the file() method
jar {
  destinationDir = file('build/jar')
}