Format Double as Fraction [closed]

Answer 1

i wrote this for my project i hope it could be usefull:

//How to "Convert" double to fraction("a/b") - kevinlopez@unitec.edu
private boolean isInt(double number){
    if(number%2==0 ||(number+1)%2==0){
        return true;
    }
    return false;
}
private String doubleToFraction(double doub){
    //we get the whole part
    int whole = (int)doub;
    //we get the rest
    double rest = doub - (double)whole;
    int numerator=1,denominator=1;
    //if the whole part of the number is greater than 0
    //we'll try to transform the rest of the number to an Integer
    //by multiplying the number until it become an integer
    if(whole >=1){
        for(int i = 2; ; i++){
            /*when we find the "Integer" number(it'll be the numerator)
             * we also found the denominator(i,which is the number that transforms the number to integer)
             * For example if we have the number = 2.5 when it is multiplied by 2
             * now it's 5 and it's integer, now we have the numerator(the number (2.5)*i(2) = 5)
             * and the denominator i = 2
             */
            if(isInt(rest*(double)i)){
                numerator = (int)(rest*(double)i);
                denominator = i;
                break;
            }
            if(i>10000){
                //if i is greater than 10000 it's posible that the number is irrational
                //and it can't be represented as a fractional number
                return doub+"";
            }
        }
        //if we have the number 3.5 the whole part is 3 then we have the rest represented in fraction 0.5 = 1/2
        //so we have a mixed fraction 3+1/2 = 7/2
        numerator = (whole*denominator)+numerator;
    }else{
        //If not we'll try to transform the original number to an integer
        //with the same process
        for(int i = 2; ; i++){
            if(isInt(doub*(double)i)){
                numerator = (int)(doub*(double)i);
                denominator = i;
                break;
            }
            if(i>10000){
                return doub+"";
            }
        }
    }
    return numerator+"/"+denominator;
}