Class NumberRenderer

output/java8/1.4.17/NumberRenderer.java:44–53

Works with Byte, Short, Integer, Long, and BigInteger as well as Float, Double, and BigDecimal. You pass in a format string suitable for Formatter#format. For example, %10d emits a number as a decimal int paddin

public class NumberRenderer implements AttributeRenderer {
    @Override
    public String toString(Object o, String formatString, Locale locale) {
        // o will be instanceof Number
        if (formatString==null ) return o.toString();
        Formatter f = new Formatter(locale);
        f.format(formatString, o);
        return f.toString();
    }
}