public static void main(String[] args) {
    ComplexNumber A = new ComplexNumber(2, 3);
    ComplexNumber B = new ComplexNumber(1, 4);

    System.out.println("Add  result: " + A.addComplex(B).toString());
    System.out.println("Sub  result: " + A.subComplex(B).toString());
    System.out.println("Mult result: " + A.multComplex(B).toString());
    System.out.println("Div  result: " + A.divComplex(B).toString());
    System.out.println("A Mag: " + A.magComplex());
    System.out.println("B Mag: " + B.magComplex());
  }