Consider the application of international ecommerce Now you

Consider the application of international e-commerce. Now you are asked to extend that solution to deal with another aspect of doing business internationally online: depending on the location of the consumers, the system is supposed to automatically convert the price into the local currency and display it. Provide a skeleton implementation in Java.

Solution

import java.util.Scanner;

public class currency {

public currency() {

        char us_dollar_sym = 36;

        char pound_sym = 163;

        char yen_sym = 165;

        char euro_sym = 8364;

        String us_dollar = \"Dollars\";

        String pound = \"Pounds\";

        String yen = \"Yen\";

        String euro = \"Euros\";

        double rate = 0;

        // Interface

        System.out.println(\"Welcome to the Currency Converter Program \ \");

        System.out

                .println(\"Use the following codes to input your currency choices: \ 1 - US dollars \ 2 - Euros \ 3 - British Pounds \ 4 - Japanese Yen \ \");

        //

        System.out.println(\"Please choose the input currency:\");

        Scanner in = new Scanner(System.in);

        int choice = in.nextInt();

        String inType = null;

        switch (choice) {

        case 1:

            inType = \"US Dollars >> \" + us_dollar_sym;

            break;

        case 2:

            inType = \"Euros >> \" + euro_sym;

            break;

        case 3:

            inType = \"British Pounds >> \" + pound_sym;

            break;

        case 4:

            inType = \"Japanese Yen >> \" + yen_sym;

            break;

        default:

            System.out

                    .println(\"Please restart the program & enter a number from the list.\");

            return;

        }

        System.out.println(\"Please choose the output currency\");

        int output = in.nextInt();

        System.out.printf(\"Now enter the input in \" + inType);

        double input = in.nextDouble();

        if (choice == output)

            System.out.println(\"Same currency no need to convert\");

        if (choice == 1 && output == 2) {

            double dollar_euro_rate = 0.78391;

            rate = input * dollar_euro_rate;

            System.out.printf(\"%s\" + input + \" at a conversion rate of \"

                    + dollar_euro_rate + \" Dollars to %s = %.2f\ \",

                    (char) us_dollar_sym, euro, rate);

        } else if (choice == 1 && output == 3) {

            double dollar_pound_rate = 0.621484;

            rate = input * dollar_pound_rate;

            System.out.printf(\"%s\" + input + \" at a conversion rate of \"

                    + dollar_pound_rate + \" Dollars to %s = %.2f\ \",

                    (char) us_dollar_sym, pound, rate);

        } else if (choice == 1 && output == 4) {

            double dollar_yen_rate = 107.174;

            rate = input * dollar_yen_rate;

            System.out.printf(\"%s\" + input + \" at a conversion rate of \"

                    + dollar_yen_rate + \" Dollars to %s = %.2f\ \",

                    (char) us_dollar_sym, yen, rate);

        }

        if (choice == 2 && output == 1) {

            double euro_dollar_rate = 1.27579;

            rate = input * euro_dollar_rate;

            System.out.printf(\"%s\" + input + \" at a conversion rate of \"

                    + euro_dollar_rate + \" Euros to %s = %.2f\ \",

                    (char) euro_sym, us_dollar, rate);

        } else if (choice == 2 && output == 3) {

            double euro_pound_rate = 0.792648;

            rate = input * euro_pound_rate;

            System.out.printf(\"%s\" + input + \" at a conversion rate of \"

                    + euro_pound_rate + \" Euros to %s = %.2f\ \",

                    (char) euro_sym, pound, rate);

        } else if (choice == 2 && output == 4) {

            double euro_yen_rate = 136.708;

            rate = input * euro_yen_rate;

            System.out.printf(\"%s\" + input + \" at a conversion rate of \"

                    + euro_yen_rate + \" Euros to %s = %.2f\ \", (char) euro_sym,

                    yen, rate);

        }

        if (choice == 3 && output == 1) {

            double pound_dollar_rate = 1.60972;

            System.out.printf(\"%s\" + input + \" at a conversion rate of \"

                    + pound_dollar_rate + \" Pounds to %s = %.2f\ \",

                    (char) pound_sym, us_dollar, rate);

        } else if (choice == 3 && output == 2) {

            double pound_euro_rate = 1.26161;

            System.out.printf(\"%s\" + input + \" at a conversion rate of \"

                    + pound_euro_rate + \" Pounds to %s = %.2f\ \",

                    (char) pound_sym, euro, rate);

        } else if (choice == 3 && output == 4) {

            double pound_yen_rate = 172.511;

            System.out.printf(\"%s\" + input + \" at a conversion rate of \"

                    + pound_yen_rate + \" Pounds to %s = %.2f\ \",

                    (char) pound_sym, yen, rate);

        }

        if (choice == 4 && output == 1) {

            double yen_dollar_rate = 0.00932574;

            System.out.printf(\"%s\" + input + \" at a conversion rate of \"

                    + yen_dollar_rate + \" Yen to %s = %.2f\ \", (char) yen_sym,

                    us_dollar, rate);

        } else if (choice == 4 && output == 2) {

            double yen_euro_rate = 0.00730615;

            System.out.printf(\"%s\" + input + \" at a conversion rate of \"

                    + yen_euro_rate + \" Yen to %s = %.2f\ \", (char) yen_sym,

                    euro, rate);

        } else if (choice == 4 && output == 3) {

            double yen_pound_rate = 0.00579135;

            System.out.printf(\"%s\" + input + \" at a conversion rate of \"

                    + yen_pound_rate + \" Yen to %s = %.2f\ \", (char) yen_sym,

                  pound, rate);

        }

        System.out.println(\"Thank you for using the currency converter\");

    }

}