A short guide to show you how to convert a String with commas to a long type.
1. For a normal String, you can use Long.valueOf to convert it directly.
String bigNumber = "1234567899";
long result = Long.valueOf(bigNumber);
2. For a String with commas, you can use java.text.NumberFormat to convert it.
String bigNumber = "1,234,567,899";
NumberFormat format = NumberFormat.getInstance(Locale.US);
Number number = 0;
try {
number = format.parse(bigNumber);
} catch (ParseException e) {
e.printStackTrace();
}
long result = number.longValue();
3. Alternatively, if you don’t care about Locale, just replace all the commas.
String bigNumber = "1,234,567,899";
long result3 = Long.valueOf(bigNumber.replaceAll(",", "").toString());
Done.
