Decimal to Fraction

[evenflow58]

I've created a Fraction class that will take a double in the constructor and transform it into a printable fraction. I've got everything working fine except for repeating fractions like 1/3. I know I need to change the code for my Fraction constructor (using doubles), but I'm not sure how.

Here is my fraction class:

public class Fraction
{
int n,d;

public Fraction()
{
n=0;
d=0;
}
public Fraction (double doubleFraction)
{
this.gcd((int)(doubleFraction*100),100);
}
public Fraction (int numerator, int denominator)
{
this.gcd(numerator,denominator);
}
private void gcd (int numerator, int denominator)
{
int highest;

if (denominator>numerator)
highest=denominator;
else
highest=numerator;

for(int x = highest;x>0;x--)
{
if (denominator%x==0 && numerator%x==0)
{
this.n=numerator/x;
this.d=denominator/x;
break;
}
}
}
public String getFraction()
{
int wholeNumber;

if (this.n == this.d)
return("" + 1);
else if (this.d > this.n)
return (this.n + "/" + this.d);
else
{
Fraction test = new Fraction(this.n,this.d);
wholeNumber = (int)(test.n/test.d);

test.gcd(test.n%test.d,test.d);

return (wholeNumber + " " + test.n + "/" + test.d);
}
}
}

Thanks for any help.