penis!

public class Rational{

private int n;
private int d;

  public Rational(){
    this.setNumerator(0);
    this.setDenominator(1);
  }

  public Rational(int num){
    this.setNumerator(num);
    this.setDenominator(1);
  }

  public Rational(int num, int denom){
    this.setNumerator(num);
    this.setDenominator(denom);
    this.reduce();
  }

  public Rational( Rational r ){
    setNumerator(r.getNumerator());
    setDenominator(r.getDenominator());
    r.reduce();
  }

  private int getNumerator(){
    return this.n;
  }

  private int getDenominator(){
    return this.d;
  }

  private void setNumerator(int num){
    n = num;
  }

  private void setDenominator(int denom){
    if (denom != 0)
      d = denom;
    else
      throw new IllegalArgumentException("Denominator cannot be 0!");
  }

  private int gcd(int x, int y){
    if (y==0)
      return x;
    else
      return gcd(y, x%y);
  }

  private void reduce(){
    int divisor;
    divisor = gcd(Math.abs(n), Math.abs(d));
    System.out.println("DIVISOR IS: " + divisor);
    if (n<0 && d < 0){
      n*=-1;
      d*=-1;
    }
    else if (n > 0 && d < 0){
      n *= -1;
      d *= -1;
    }
    n = n/divisor;
    d = d/divisor;
  }

  public Rational add( Rational r){
    int newNum;
    int newDenom;
    Rational rat;
    newNum = n*r.getDenominator()+d*r.getNumerator();
    newDenom = d*r.getDenominator();
    rat = new Rational(newNum, newDenom);
    rat.reduce();
    return rat;
  }

  public Rational subtract(Rational r){
    int newNum;
    int newDenom;
    Rational rat;
    newNum = n*r.getDenominator()-d*r.getNumerator();
    newDenom = d*r.getDenominator();
    rat = new Rational(newNum, newDenom);
    rat.reduce();
    return rat;
  }

  public Rational multiply(Rational r){
    int newNum;
    int newDenom;
    Rational rat;
    newNum = n*r.getNumerator();
    newDenom = d*r.getDenominator();
    rat = new Rational(newNum, newDenom);
    rat.reduce();
    return rat;

  }

  public Rational divide(Rational r){
    int newNum;
    int newDenom;
    Rational rat;
    newNum = n*r.getDenominator();
    newDenom = d*r.getNumerator();
    rat = new Rational(newNum, newDenom);
    rat.reduce();
    return rat;

  }

  public String toString(){
    if (n == 0)
      return "0";
    if (d == 1)
      return ""+this.getNumerator();
    return "" + n + "/" + d;
  }

  public float toFloat(){
    float ratNum;
    ratNum = (float)n/d;
    return ratNum;
  }

  public boolean equals(Object obj){
    if (obj.getClass() != this.getClass())
      return false;
    if (obj == null)
      return false;
    if (!(obj instanceof Rational))
      return false;
    else{
      Rational temp = (Rational) obj;
      if(n == temp.getNumerator()){
        if(d== temp.getDenominator())
          return true;
      }
    }
    return false;
  }

  public int hashCode(){
    return this.toString().hashCode();
  }
}