Kilometers Converter

import java.util.Scanner;



/**
 *
 * @author orice1157
 */
public class FinalExam_Rice {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        Scanner scan = new Scanner(System.in);
        double kilometers = getValidKM();
        double miles = calculateMiles(kilometers);
        String repeat = "Yes";

        while (repeat.equalsIgnoreCase("YES")) {

        getValidKM();
        calculateMiles(kilometers);
        displayResults(kilometers, miles);

        System.out.print("Enter \"YES\" to convert another number--> ");
        repeat = scan.nextLine();
        }

    }
        public static double getValidKM()
        {
            Scanner scan = new Scanner(System.in);
            double km;
            do {
            System.out.print("Enter a number of Kilometers greater than 0--> ");
            km = scan.nextDouble();
            }while (km < 0);

            return km;
        }

        public static double calculateMiles(double km)
        {
            double m = km * 0.62137119;

            return m;
        }

        public static void displayResults(double km, double m)
        {
            System.out.println(km + " kilometers is equivalent to " + m + " miles.");
        }

}