Java tutorial
//package com.java2s; import java.text.DecimalFormat; public class Main { public static String formatDecimal(String dcChgAmt) { if (isNumeric(dcChgAmt)) { return formatDecimal(Float.valueOf(dcChgAmt)); } return dcChgAmt; } public static String formatDecimal(float value) { DecimalFormat df = new DecimalFormat("#.##"); return df.format(value); } public static boolean isNumeric(String str) { return str.matches("-?\\d+(\\.\\d+)?"); //match a number with optional '-' and decimal. } }