// intro-dialog/KmToMiles.java - Convert kilometers to miles.
// Use JOptionPane for input / output.
// Michael Maus, 28 Oct 2004
import javax.swing.*;
public class KmToMiles {
//================================================================= main
public static void main(String[] args) {
//... Local variables
String kmStr; // String km before conversion to double.
double km; // Number of kilometers.
double mi; // Number of miles.
//... Input
kmStr = JOptionPane.showInputDialog(null, "Enter kilometers.");
km = Double.parseDouble(kmStr);
//... Computation
mi = km * 0.621; // There are 0.621 miles in a kilometer.
//... Output
JOptionPane.showMessageDialog(null, km + " kilometers is "
+ mi + " miles.");
//... Stop
System.exit(0); // Stop GUI program
}
}