Program Java Operasi Pecahan

Ini Codenya:
Github


public class Fraction {

    int numerator;
    int denominator;


    public Fraction(int numr, int denr) {
numerator = numr;
denominator = denr;
reduce();
    }

    public int getNumerator() {
return numerator;
    }

    public void setNumerator(int numerator) {
this.numerator = numerator;
    }

    public int getDenominator() {
return denominator;
    }

    public void setDenominator(int denominator) {
this.denominator = denominator;
    }


    public int calculateGCD(int numerator, int denominator) {
if (numerator % denominator == 0) {
             return denominator;
        }
return calculateGCD(denominator, numerator % denominator);
}


    void reduce() {
int gcd = calculateGCD(numerator, denominator);
numerator /= gcd;
denominator /= gcd;
    }


    public Fraction add(Fraction fractionTwo) {
int numer = (numerator * fractionTwo.getDenominator()) +
                            (fractionTwo.getNumerator() * denominator);
int denr = denominator * fractionTwo.getDenominator();
return new Fraction(numer, denr);
    }


    public Fraction subtract(Fraction fractionTwo) {
        int newNumerator = (numerator * fractionTwo.denominator) -
                                 (fractionTwo.numerator * denominator);
int newDenominator = denominator * fractionTwo.denominator;
Fraction result = new Fraction(newNumerator, newDenominator);
return result;
    }


    public Fraction multiply(Fraction fractionTwo) {
int newNumerator = numerator * fractionTwo.numerator;
int newDenominator = denominator * fractionTwo.denominator;
Fraction result = new Fraction(newNumerator, newDenominator);
return result;
    }


    public Fraction divide(Fraction fractionTwo) {
int newNumerator = numerator * fractionTwo.getDenominator();
int newDenominator = denominator * fractionTwo.numerator;
Fraction result = new Fraction(newNumerator, newDenominator);
return result;
    }


    @Override
    public String toString() {
return this.numerator + "/" + this.denominator;
    }

    public static void main(String[] args) {
Fraction f1 = new Fraction(3, 5);
System.out.println(f1.toString());
Fraction f2 = new Fraction(2, 5);
Fraction f3 = f1.add(f2);
System.out.println("Hasil  " + f1 + " + " + f2 + " adalah : " + f3);
f3 = f1.subtract(f2);
System.out.println("Hasil  " + f1 + " - " + f2 + " adalah : " + f3);
f3 = f1.divide(f2);
System.out.println("Hasil  " + f1 + " / " + f2 + " adalah : " + f3);
f3 = f1.multiply(f2);
System.out.println("Hasil  " + f1 + " * " + f2 + " adalah : " + f3);
    }
}