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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4. import java.util.regex.*;
  5. class Ideone
  6. {
  7. 	public static void main (String[] args) throws java.lang.Exception
  8. 	{
  9. 		String s = "::a:b?:c??::d???????:e::";
  10. 		Pattern pattern = Pattern.compile("(?>\\?.|[^:?])+|(?<=:)(?=:)");
  11. 		Matcher matcher = pattern.matcher(s);
  12. 		while (matcher.find()){
  13. 			System.out.println("'" + matcher.group() + "'"); 
  14. 		} 
  15. 	}
  16. }
Success #stdin #stdout 0.05s 2184192KB
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stdin
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Standard input is empty
stdout
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''
'a'
'b?:c??'
''
'd???????:e'
''
https://ideone.com/fe3lR8
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
secret

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