Money Rounding

Question

Hi all,
I've looked-up the BigDecimal class from Math and i wana round the money such that it is always ROUND UP in 5 or 10 cents. Eg:
$100.29 becomes $100.30
$100.22 becomes $100.25
$50.214 becomes $50.25
Any idea how to do this? Thanks

Answer 1

Although using DecimalFormat is a good choice, here is a method that do the rounding (deals with the 123.35000000001 case):
    static final double DELTA = 0.01;
    // num must be positive
    public double round(double num) {
        double numex = num * 100;
        int inumex = (int)numex;
        if ((numex - inumex) > DELTA)
            inumex++;
        int rest = inumex % 5;
        if (rest > 0)
            inumex += 5 - rest;
        return (double)inumex / 100;
    }Regards