How to remove symbol from string Java

Question

I have a string "00000000800540" . Always identical length of string. But can change the number of zeros to 8. Instead, 8 can also another number. How to get me the number 800540 from the string?

do you want to strip all left padded `0` ? – Sanjeev Apr 27 '16 at 07:31 — Sanjeev, Apr 27 '16 at 07:31
Yes you can. Share what you have tried out – sidgate Apr 27 '16 at 07:31 — sidgate, Apr 27 '16 at 07:31
Here's a silly way: `Long.valueOf(str).toString()` – shmosel Apr 27 '16 at 07:33 — shmosel, Apr 27 '16 at 07:33

Adnan Isajbegovic · Answer 1 · 2016-04-27T07:39:36.497

1

You can use this:

   givenNumberAsString.replaceFirst("^0+(?!$)", "")

This will work no matter how long your string is.

edited Apr 27 '16 at 07:39

answered Apr 27 '16 at 07:32

Adnan Isajbegovic

2,227
17
27

Andy Turner · Answer 2 · 2016-04-27T08:02:24.137

1

A non-regex way:

int i = 0;
while (i < str.length() && str.charAt(i) == '0') ++i;
String withoutLeadingZeros = str.substring(i);

This will trim all zeros, even if the string is all zeros. If you want to preserve the last zero in this case, change the while loop guard to:

i + 1 < str.length() && str.charAt(i) == '0'

edited Apr 27 '16 at 08:02

answered Apr 27 '16 at 07:39

Andy Turner

137,514
11
162
243

I would leave the last digit alone. – shmosel Apr 27 '16 at 07:46
@shmosel noted, and added a modification to handle this if required. – Andy Turner Apr 27 '16 at 09:30

score 0 · Answer 3 · answered Apr 27 '16 at 07:37

Depending on the length of the expected number contained in string, you can use Integer.parseInt(**string**) or Long.parseLong(**string**).

String st = "00000000800540";
System.out.println(Long.parseLong(st));     // 800540
System.out.println(Integer.parseInt(st));   // 800540

How to remove symbol from string Java

3 Answers3