Question

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How can I format a String number to have commas and round?

I have a string variable (That is a number in string format) and now I want to use a comma for separation for every three digits. how can I do it?
My technology is Struts2

Answer 1

For Example:turn 100000 to 100,000

public class number
{
    public static void main(String args [])
    {
        double d = 123456.78;
        DecimalFormat df = new DecimalFormat("###,### ");
        System.out.
        println(df.format(d));
    }
}