Curency converter 2(advanced)- Java

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
/*** Created by AiKiHack on 13-03-2017 02:21 in project dataTypes11032017 ***/
public class p12ce_CurrencyConverter {
    static Scanner consolein = new Scanner(System.in);
    static Map<String, Double> rates = new HashMap<String, Double>();
    public static void main(String[] args) {
        rates.put("BGN", new Double(1.0));
        rates.put("USD", new Double(1.79549));
        rates.put("EUR", new Double(1.95583));
        rates.put("GBP", new Double(2.53405));
        double inputSum = Double.parseDouble(consolein.nextLine());
        String currIn = consolein.nextLine();
        String currOut = consolein.nextLine();
        if (rates.get(currIn) == null){newCurrency(currIn);} // TODO check HashMap not exists(key)
        if (rates.get(currOut) == null){newCurrency(currOut);} // TODO check HashMap not exists(key)
        double result = inputSum * rates.get(currIn) / rates.get(currOut);
        System.out.printf("%.2f %s", result, currOut);
    }
    public static void newCurrency(String currCode) {
        System.out.printf("Currency rate for %s unavailable! \n To Add new rate type 'YES' \n", currCode);
        String answer = consolein.nextLine();
        double newRate;
        if (answer.equals("YES")){
            System.out.printf("Add rate for %s : \n", currCode);
            newRate = Double.parseDouble(consolein.nextLine());
            rates.put(currCode, new Double(newRate));
        }
    }
}