Currency Conversion Calc

CurrencyProg.java

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package currencyprog;

import java.io.BufferedReader;
import java.io.InputStreamReader;

/**
 *
 * @author sun
 */
public class CurrencyProg {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Currency myCurrency=new Currency();
        //double amount;
        char choice = 0;
        System.out.println("Welcome to the Currency Converter!");
        System.out.print("Enter an amount in GBP:");
        myCurrency.pound=readNumber();
        do{
        menu();
        choice=readOption();
        switch(choice){
            case 'e':
            case 'E':
                System.out.println("The equivalent amount in EUR is: "+myCurrency.convertToEUR());
                break;
            case 'd':
            case 'D':
                System.out.println("The equivalent amount in DOLLAR is: "+myCurrency.convertToUSD());
                break;                
            case 'u':
            case 'U':
                System.out.print("Enter a new amount in GBP: ");
                myCurrency.updateGBP(readNumber());
                break;
            case 'q':
            case 'Q':
                System.out.println("PROGRAM ENDED ");
                System.exit(0);
                break;
            }
        }while(choice!='q');
        
    }
    //////////////////////////////////////////////////////////
    
    static  double readNumber(){
        double number=0;
               try{       
                        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
                        number = Double.parseDouble(br.readLine());
                 } catch(Exception e){
                        System.out.println("Notice " +e.getMessage());
                        System.exit(0); }
               return number;

    }
    //////////////////////////////////////////////////////////
    static void menu(){
    System.out.println("Type:");
    System.out.println("e    to print the equivalent amount in EUR");
    System.out.println("d    to print the equivalent amount in USD");
    System.out.println("u    to update the amount in GBP");
    System.out.println("q    to quit");
    System.out.print("Enter selection: ");
    
    }
    //////////////////////////////////////////////////////////
    static char readOption(){
    char x = 0;
               try{       
                        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
                        x= br.readLine().toUpperCase().charAt(0);
                 } catch(Exception e){
                        System.out.println("Notice " +e.getMessage());
                        System.exit(0); }
                    return x;
               }


}
currency.java
package currencyprog;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author sun
 */
public class Currency {
double euro;
double pound;
double dollar;
Currency(){
   euro=1.2;
   pound=1.0;
   dollar=1.6;
}
double convertToEUR(){
   return pound*euro;
   }
double convertToUSD(){
   return pound*dollar;
   }
void updateGBP(double x){
   pound=x;
   } 
}