import javax.swing.JOptionPane; 

public class Fractions {

 public static void main(String[] args) {
   Fraction f1, f2, f3;
   
   f1 = new Fraction(5);
   f2 = new Fraction(12, 8);
   
   System.out.println("F1 = " + f1);
   System.out.println("F1 = " + f2);
   
   String line = JOptionPane.showInputDialog("Enter a fraction.");
   
   String[] pieces = line.split("/");
   f3 = new Fraction(Integer.parseInt(pieces[0]), Integer.parseInt(pieces[1]));
   System.out.println("F3 = " + f3);
   }

}