1  public class TestRationalClass {
  2    /** Main method */
  3    public static void main(String[] args) {
  4      // Create and initialize two rational numbers r1 and r2.
  5      Rational r1 = new Rational(4, 2);
  6      Rational r2 = new Rational(2, 3);
  7  
  8      // Display results
  9      System.out.println(r1 + " + " + r2 + " = " + r1.add(r2));
 10      System.out.println(r1 + " - " + r2 + " = " + r1.subtract(r2));
 11      System.out.println(r1 + " * " + r2 + " = " + r1.multiply(r2));
 12      System.out.println(r1 + " / " + r2 + " = " + r1.divide(r2));
 13      System.out.println(r2 + " is " + r2.doubleValue());
 14    }
 15  }