Hi can someone help me design a user menu for this fraction class? I am having a hard time of thinking of how to do it and could use some fresh eyes.

Here is my fraction Class in qoutes below, Remember I need help with designing the menu.

"public class Fraction {

private long numerator; private long denominator;

public Fraction( ) {

numerator = 1; denominator = 1;

} public Fraction( long numerator, long denominator ) {

this.numerator = numerator;

if ( denominator == 0 ) { System.out.println("WARNING: Fraction( long, long ) Constructor"); System.out.println(" A value of zero for denominator detected."); System.out.println(" The value has been changed to one."); this.denominator = 1;

}

else

this.denominator = denominator;

Reduce();

} public Fraction( Fraction fraction ) {

if (fraction == null) { System.out.println("Fraction Constructor: Deep Copy Error."); System.exit( 0 );

}

numerator = fraction.numerator; denominator = fraction.denominator;

Reduce();

} public void Add( Fraction that ) {

long a; long b; long c; long d;

a = this.numerator; b = this.denominator;

c = that.numerator;

d = that.denominator;

this.numerator = a*d + c*b; this.denominator = b*d; Reduce();

} public void Subtract( Fraction that ) {

long a; long b; long c; long d;

a = this.numerator; b = this.denominator;

c = that.numerator;

d = that.denominator;

this.numerator = a*d - c*b; this.denominator = b*d; Reduce();

} public void Divide( Fraction that ) {

long a; long b; long c; long d;

a = this.numerator; b = this.denominator;

c = that.numerator; d = that.denominator;

this.numerator = a*d; this.denominator = c*d; Reduce();

} public void Multiply( Fraction that ) {

long a; long b; long c; long d;

a = this.numerator; b = this.denominator;

c = that.numerator;

d = that.denominator;

this.numerator = a*c; this.denominator = b*d; Reduce();

} public void SetNumerator( long numerator ) {

this.numerator = numerator; Reduce();

} public void SetDenominatortor( long denominator ) {

if ( denominator == 0 ) { System.out.println("WARNING: SetDenominatortor( long ) Mutator Method."); System.out.println(" A value of zero for denominator detected."); System.out.println(" The value has been changed to one."); this.denominator = 1;

}

else

this.denominator = denominator;

Reduce();

} public void Set( Fraction fraction ) {

numerator = fraction.numerator; denominator = fraction.denominator; Reduce();

}

public double GetNumerator( ) {

return numerator;

}

public double GetDenominator( ) {

return denominator;

}

public Fraction Get( ) {

return new Fraction(numerator, denominator);

}

@Override public String toString( ) {

return numerator + "/" + denominator;

} @Override

public int hashCode( ) {

int hash = 7;

hash = 41 * hash + (int) (this.numerator ^ (this.numerator >>> 32)); hash = 41 * hash + (int) (this.denominator ^ (this.denominator >>> 32));

return hash;

} @Override

public boolean equals(Object otherObject ) {

if ( otherObject == null ) return false;

else if ( getClass() != otherObject.getClass() )

return false;

else {

Fraction otherFraction = (Fraction)otherObject;

return ( (numerator == otherFraction.numerator) &&

(denominator == otherFraction.denominator) );

}

} private long GreatestCommonDivisor( long a, long b ) {

if ( a%b == 0 ) return b; else return GreatestCommonDivisor(b, a%b);

} private long IterativeGCD( long a, long b ) {

if ( a == 0 ) return b;

while ( b != 0 ){

if ( a > b ) a = a - b; else b = b - a;

} // while return a;

}

private void Reduce( ) {

long gcd = GreatestCommonDivisor( numerator, denominator );

numerator = numerator/gcd;

denominator = denominator/gcd; }

}"