Round half even for double

Question

I need to round to nearest 0.5 if possible.

10.4999 = 10.5

Here is quick code:

import java.text.DecimalFormat;
import java.math.RoundingMode;         


        

Answer 1

public class DecimalFormat  
{  
    public static void main(String[] args)  
    {  
        double test = 10.4999;

        double round;
        int i = (int) test;
        double fraction = test - i;
        if (fraction < 0.25) {
            round = (double) i;
        } else if (fraction < 0.75) {
            round = (double) (i + 0.5);
        } else {
            round = (double) (i + 1);
        }
        System.out.println("Format: " + round);
    }  
}