import javax.swing.*;
import java.text.*;
public class Capital {
    public static void main(String[] arg)    {
        int startYear = readStarYear();
        int endYear = readEndYear();
        double capital = readCapital();
        double interest = readInterest();
        writeTable(startYear, endYear, capital, interest);
    } // main

    private static int readStarYear() {
        String input = JOptionPane.showInputDialog("Ange startår: ");
        return Integer.parseInt(input);
    }//readStartYear

    private static int readEndYear() {
        String input = JOptionPane.showInputDialog("Ange slutår: ");
        return Integer.parseInt(input);
    }//readEndYear

    private static double readCapital() {
        double capital;
        while (true) {
            String input = JOptionPane.showInputDialog("Ge startkapital: ");
            capital = Double.parseDouble(input);
            if (capital > 0)
                break;
            JOptionPane.showMessageDialog(null, "Kapitalet måste vara positivt!!");
        }
        return capital;
    }//readCapital

    private static double readInterest() {
        double interest;
        while (true) {
            String input = JOptionPane.showInputDialog("Ange räntesats:");
            interest= Double.parseDouble(input);
            if (interest> 0)
                break;
            JOptionPane.showMessageDialog(null, "Räntesatsen måste vara positivt!!");
        }
        return interest;
    }//readInterest

    private static void writeTable(int startYear, int endYear, double capital, double interest) {
        NumberFormat r = NumberFormat.getInstance();
        r.setMaximumFractionDigits(2);
        String output = " År        Kapital\n";
        for (int year = startYear; year <= endYear; year = year + 1) {
            output = output + year + "       " + r.format(capital) + "\n";
            capital = capital * (1 + interest/100);
        }
        JOptionPane.showMessageDialog(null, output);
   }//writeTable
} // Capital