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3. how to call rational class in driver class and use...

# Question: how to call rational class in driver class and use...

###### Question details

How to call Rational class in Driver class

and use an arraylist to find the max and sort in acceding order?

public class Rational implements Comparable<Rational> {
// Data fields for numerator and denominator
private long numerator = 0;
private long denominator = 1;

/** Construct a rational with default properties */
public Rational() {
this(0, 1);
}

/** Construct a rational with specified numerator and denominator */
public Rational(long numerator, long denominator) {
long gcd = gcd(numerator, denominator);
this.numerator = ((denominator > 0) ? 1 : -1) * numerator / gcd;
this.denominator = Math.abs(denominator) / gcd;
}

/** Find GCD of two numbers */
private static long gcd(long n, long d) {
long n1 = Math.abs(n);
long n2 = Math.abs(d);
int gcd = 1;

for (int k = 1; k <= n1 && k <= n2; k++) {
if (n1 % k == 0 && n2 % k == 0)
gcd = k;
}

return gcd;
}

/** Return numerator */
public long getNumerator() {
return numerator;
}

/** Set numerator */
public void setNumerator(long n)
{
numerator = n;
}

/** Return denominator */
public long getDenominator() {
return denominator;
}

/** Set denominator */
public void setDenominator(long d)
{
denominator = d;
}

/** Add a rational number to this rational */
public Rational add(Rational secondRational) {
long n = numerator * secondRational.getDenominator() +
denominator * secondRational.getNumerator();
long d = denominator * secondRational.getDenominator();
return new Rational(n, d);
}

/** Subtract a rational number from this rational */
public Rational subtract(Rational secondRational) {
long n = numerator * secondRational.getDenominator()
- denominator * secondRational.getNumerator();
long d = denominator * secondRational.getDenominator();
return new Rational(n, d);
}

/** Multiply a rational number to this rational */
public Rational multiply(Rational secondRational) {
long n = numerator * secondRational.getNumerator();
long d = denominator * secondRational.getDenominator();
return new Rational(n, d);
}

/** Divide a rational number from this rational */
public Rational divide(Rational secondRational) {
long n = numerator * secondRational.getDenominator();
long d = denominator * secondRational.numerator;
return new Rational(n, d);
}

@Override
public String toString() {
if (denominator == 1)
return numerator + "";
else
return numerator + "/" + denominator;
}

@Override // Override the equals method in the Object class
public boolean equals(Object other) {
if ((this.subtract((Rational)(other))).getNumerator() == 0)
return true;
else
return false;
}

@Override // Implement the compareTo method in Comparable
public int compareTo(Rational o) {
if (this.subtract(o).getNumerator() > 0)
return 1;
else if (this.subtract(o).getNumerator() < 0)
return -1;
else
return 0;
}
}