Question

I have a string Till No. S59997-RSS01 Now I need to extract the 01 from it , but the issue is that it is dynameic means

String TillNo =pinpadTillStore.getHwIdentifier();

The value S59997-RSS01 is in TillNo, that I come to know from debugging but in real time which value is coming inside TillNo , will not be known to me but the pattern of the value will be the same (S59997-RSS01) , Please advise how to extract the last two digits like(01)

Answer 1

If the two digits will only appear at last two position, just use the substring method. For a more flexible way, use Regular Expression instead.

String TillNo = "S59997-RSS01";
System.out.println(TillNo.substring(TillNo.length() - 2));
Pattern pattern = Pattern.compile("S[\\d]{5}-RSS([\\d]{2})");
Matcher matcher = pattern.matcher(TillNo);
if (matcher.find()) {
    System.out.println(matcher.group(1));
}