Kumite

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner= new Scanner(System.in);
        while(true) {
            System.out.println("The currency rates. Enter 1,2,3,4,5,6 to now your rate  \n   1) EUR->UAH  \n   2) UAH->EUR  \n   3) UAH->USD  \n   4) USD->UAH  \n   5) CHF->USD  \n   6) USD->CHF");
            int currencyRate = scanner.nextInt();
            if (currencyRate<7) {
                System.out.println("Your amount:");
                double cash = scanner.nextDouble();

                switch (currencyRate) {
                    case 1 -> UAHToEUR(cash);
                    case 2 -> EURToUAH(cash);
                    case 3 -> UAHToUSD(cash);
                    case 4 -> USDToUAH(cash);
                    case 5 -> CHFToUSD(cash);
                    case 6 -> USDToCHF(cash);

                }
            }
            else{
                System.err.println("Not available option \nenter available option ;)\n \n \n \n \n \n\n");
            }
        }



    }
    public static void UAHToEUR(double UAH) {
        double EUR = 0.0262;
        System.out.println("UAH: " + UAH + "  EUR: " + UAH * EUR);
    }

    public static void EURToUAH(double EUR) {
        double UAH = 38.27;
        System.out.println("EUR: " + EUR + "  UAH: " + EUR * UAH);
    }

    public static void UAHToUSD(double UAH) {
        double USD = 0.0303;
        System.out.println("UAH: " + UAH + "  USD: " + UAH * USD);
    }

    public static void USDToUAH(double USD) {
        double UAH = 32.99;
        System.out.println("USD: " + USD + "  UAH: " + USD * UAH);
    }

    public static void CHFToUSD(double CHF) {
        double USD = 1.08;
        System.out.println("CHF: " + CHF + "  USD: " + CHF * USD);
    }

    public static void USDToCHF(double USD) {
        double CHF = 0.9259;
        System.out.println("USD: " + USD + "  CHF: " + USD * CHF);
    }
}