Question

write a Java console application that converts between currencies US Dollar ($), Euro (€), and Japanese Yen (¥). Prompt the user for a conversion code:

Code   Conversion   Last run input
a   US Dollar  Euro   32
b   US Dollar  Japanese Yen   64
c   Euro  US Dollar    200
d   Euro  Japanese Yen    300
e   Japanese Yen  US Dollar   24
f   Japanese Yen  Euro   28
x   Exit  

Then prompt and get from the user a currency value. Convert the currency value and show the two values, rounded to two decimal places, with appropriate units. Continue to prompt the user for conversion codes until the sentinel value of ‘x’. Research the current conversion rates, and represent and use them as double constants. Locate the UNICODE values for units € and ¥, and represent and use them as string constants. They will be in the form "\uHHHH". Use the inputs shown in the table for the last six inputs.

Answer 1

import java.util.Scanner;

public class CurrencyConverter {
   public static double USD2EURO=0.89;
   public static double USD2YEN=111.33;
   public static double EURO2USD=1.12;
   public static double EURO2YEN=124.51;
   public static double YEN2USD=0.0090;
   public static double YEN2EURO=0.0080;
  
   public static final String EUROSYM="\u20ac";
   public static final String YENSYM="\u00A5";
   public static final String USDSYM="$";
   public static void main(String[] args) {
       // TODO Auto-generated method stub
              
       Scanner sc=new Scanner(System.in);
       System.out.println("Code Conversion \t\t Last run input");
       System.out.println("a US Dollar  Euro\t \t 32");
       System.out.println("b US Dollar  Japanese Yen\t 64");
       System.out.println("c Euro  US Dollar\t\t 200");
       System.out.println("d Euro  Japanese Yen\t 300");
       System.out.println("e Japanese Yen  US Dollar\t 24");
       System.out.println("f Japanese Yen  Euro\t 28");
       System.out.println("x Exit");
      
       System.out.println("Press Enter!!");
       while(true){
           sc.nextLine();
           System.out.println("Enter the code of the conversion:");
           String choice=sc.nextLine();
           double value=0;
           switch (choice) {
           case "a":
               System.out.println("Enter the curreny value in dollar:");
               value=sc.nextDouble();
               System.out.println(value+" "+USDSYM+"="+value*USD2EURO+" "+EUROSYM);
               break;
           case "b":
               System.out.println("Enter the curreny value in dollar:");
               value=sc.nextDouble();
               System.out.println(value+" "+USDSYM+"="+value*USD2YEN+" "+YENSYM);
               break;
           case "c":
               System.out.println("Enter the curreny value in euro:");
               value=sc.nextDouble();
               System.out.println(value+" "+EUROSYM+"="+value*EURO2USD+" "+USDSYM);
               break;
           case "d":
               System.out.println("Enter the curreny value in euro:");
               value=sc.nextDouble();
               System.out.println(value+" "+EUROSYM+"="+value*EURO2YEN+" "+YENSYM);
               break;
           case "e":
               System.out.println("Enter the curreny value in yen:");
               value=sc.nextDouble();
               System.out.println(value+" "+YENSYM+"="+value*YEN2USD+" "+USDSYM);
               break;
           case "f":
               System.out.println("Enter the curreny value in yen:");
               value=sc.nextDouble();
               System.out.println(value+" "+YENSYM+"="+value*YEN2EURO+" "+EUROSYM);
               break;
           case "x":
               System.exit(0);
           default:
               break;
           }
       }
   }

}

Code a US Dollar Euro b US Dollar EJapanese Yen Conversion Last run input 32 64 200 300 Euro US Dollar d Euro Japanese Yen e Japanese Yen Dollar e Japanese Yen US Dollar f Japanese Yen Euro 28 Exit Press Enter!! Enter the code of the conversion: Enter the curreny value in euro: 2 2.0 -249.02 Enter the code of the conversion: