Java - How to split strings based on certain length ? [closed]

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I want to split this number based on length : 11101204 . Like Division would be 111. Division2=01,Division3=2,Divison 4=04; i.e., 111, 01 , 12, 04 ...I want it to be split in this way and if the number has only 3 numbers then Division should be 111 and rest should be null How can I achieve this ? Many Thanks !

Answer 1

Try with String.substring(beginIndex, endIndex)

String string = "11101204";

System.out.println(string.substring(0, 3));
System.out.println(string.substring(3, 5));
System.out.println(string.substring(5, 6));
System.out.println(string.substring(6, 8));

Output:

111
01
2
04

Answer 2

Sounds like a job for regular expressions. Your example isn't self-consistent, so you'll have to define your requirements more clearly and adjust the regex to match.

The regex "(\\d{3})(\\d{2})?" would match "111" or "11101", but not "1110" because the second capturing group (what you've called a "division") is not the required two digits. When a string matches, you would use Matcher#group(int) to get the groups. For groups that weren't matched, it will return either null or an empty string depending on whether the expression in the group can match an empty string.