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  1. import java.util.regex.Matcher;
  2. import java.util.regex.Pattern;
  3.  
  4. class Ideone {
  5. 	public static void main (String[] args) {
  6. 		final String regex = "(?=((?:[0-9],){3}[0-9]))";
  7. 		final String string = "0,1,2,3,4,5,6,7,8,9";
  8.  
  9. 		final Pattern pattern = Pattern.compile(regex);
  10. 		final Matcher matcher = pattern.matcher(string);
  11.  
  12. 		while (matcher.find()) {
  13. 			System.out.println(matcher.group(1));
  14. 		}
  15. 	}
  16. }
Success #stdin #stdout 0.08s 27936KB
comments ()
stdin
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Standard input is empty
stdout
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0,1,2,3
1,2,3,4
2,3,4,5
3,4,5,6
4,5,6,7
5,6,7,8
6,7,8,9
https://ideone.com/B8DKit
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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