Question

Im totally new to java and my first task is to make a currency calculator from US dollar to NOK(Norsk Kroner). And the program should calculate and show how this amount most effectively can be cashed out i all norwegian paying units. I Have been trying all day, but getting nowhere. Anybody who can help me out with my code?

Heres my code:

/*
 * Valutacalc
 *
 */

import static java.lang.System.*;
import static java.lang.Integer.*;
import static javax.swing.JOptionPane.*;

public class Kalkulator {
    public static void main(String[] args) {
        // Leser verdi fra brukeren
        String tallTxt = showInputDialog("Antall US Dollar");
        int dollar = parseInt(tallTxt);
        double valuta = 5,49;
        // Beregner svarene av regnearbeidet /
        int svar1 = dollar * valuta;
        //Skriv ut resultat
        showMessageDialog(null,   dollar  * " * " valuta " = " + svar1 + "\n");
    }
}

Answer 1

replace

double valuta = 5,49;

by

double valuta = 5.49;

Because decimal point in java is ‘.’ not ‘,’.

May be you also want to change type of svar1 to double

also change:

    showMessageDialog(null,   dollar  * " * " valuta " = " + svar1 + "\n");

to

    showMessageDialog(null,   dollar  + " * " + valuta + " = " + svar1 + "\n");

The hole code:

public static void main(String[] args) {
    // Leser verdi fra brukeren
    String tallTxt = showInputDialog("Antall US Dollar");
    int dollar = parseInt(tallTxt);
    double valuta = 5.49;
    // Beregner svarene av regnearbeidet /
    double svar1 = dollar * valuta;   
    //Skriv ut resultat
    showMessageDialog(null,   dollar  + " * " + valuta + " = " + svar1 + "\n");
}