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  1. import java.util.*;
  2. import java.util.regex.Matcher;
  3. import java.util.regex.Pattern;
  4.  
  5. class Ideone
  6. {
  7.  
  8. 	private static List<Integer> indices = new ArrayList<Integer>();
  9. 	private static List<String> result = new ArrayList<String>();
  10.  
  11. 	public static void main (String[] args) throws java.lang.Exception
  12. 	{
  13.  
  14. 		String str = "a:b?:c??:d???:e????:f";
  15.  
  16. 		Pattern pattern = Pattern.compile("(?<!\\?)(?:\\?{2})*:");
  17. 		Matcher matcher = pattern.matcher(str);
  18.  
  19. 		while(matcher.find()) {
  20. 			result.add(str.substring(getLastIndex(), matcher.end() - 1));
  21. 			indices.add(matcher.end());
  22. 		}
  23. 		result.add(str.substring(getLastIndex()));
  24. 		System.out.print(result);
  25. 	}
  26.  
  27. 	private static int getLastIndex() {
  28. 		if(indices.isEmpty()) {
  29. 			return 0;
  30. 		} else {
  31. 			return indices.get(indices.size() - 1);
  32. 		}
  33. 	}
  34. }
Success #stdin #stdout 0.04s 4575232KB
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Standard input is empty
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[a, b?:c??, d???:e????, f]
https://ideone.com/x9ObjM
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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