java method for number formatting

[marall80]

i have a field(price) ,sometimes it is decimal sometimes it is string.

i want to format it with NumberFormat class like (123,356,565)

i know that i shoud make a method for this but i dont know how

i have a class like this i should add my method to it.

this method makes the first character of str upper case.

please help me



public class StringUtils {
private static NumberFormat nf = NumberFormat.getInstance();

/**
* makes the first character of str upper case.
*/
public static String firstCharUp(String str) {
if (str == null)
return null;
if (str.length() == 0)
return str;
StringBuilder sb = new StringBuilder(str);
char firstChar = sb.charAt(0);
sb.setCharAt(0, Character.toUpperCase(firstChar));
return sb.toString();
}

}

[r035198x]

NumberFormat (Java Platform SE 6)