How can we Use new methods in TimeUnit

import java.util.concurrent.TimeUnit;

public class TimeUnitDemo {
public static void main(String[] args) {
TimeUnit tu = TimeUnit.DAYS;

System.out.println(tu.toDays(1));
System.out.println(tu.toHours(1));
System.out.println(tu.toMinutes(1));

}
}