What is the best way to separate double into two parts “integer & fraction” in java

Question

I have tried to separate 5.6 (for example) by the following method:

private static double[] method(double d)
{
    int integerPart = 0;
    double fractionPart =         


        

Answer 1

Use BigDecimal to do that same calculation. (using doubles has precision problems because of its representation).

• Construct it with new BigDecimal(String.valueOf(yourDouble)) (this is still going through string, but the parts are not separated via string manipulation)
• use bd.subtract(new BigDecimal(bd.intValue()) to determine the fraction