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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		String regex = "[^-]*(-[^-]+)*-?;.*";
  13. 		String[] data = (
  14. 				  "; -- a           : should match\r\n"
  15. 				+ "-- a ;           : should not match\r\n"
  16. 				+ "-- ;             : should not match\r\n"
  17. 				+ "--;              : should not match\r\n"
  18. 				+ "-;-              : should match\r\n"
  19. 				+ "---;             : should not match\r\n"
  20. 				+ "-- semicolon ;   : should not match\r\n"
  21. 				+ "bla              : should not match (; is mandatory)\r\n"
  22. 				+ "-;--;            : should match (the first occuring semicolon must not have two or more consecutive leading '-')\r\n"
  23. 				+ "--;--;            : should match (the first occuring semicolon must not have two or more consecutive leading '-')\r\n"
  24. 				+ "--;-;            : should match (the first occuring semicolon must not have two or more consecutive leading '-')\r\n"
  25. 				+ "bla ; bla        : should match").split("(?m)\\s*:.*$(\r\n)?");
  26.  
  27. 		for (String s : data)
  28. 			System.out.printf("%-15s -> %b%n",s,s.matches(regex));
  29.  
  30. 	}
  31. }
Success #stdin #stdout 0.08s 380224KB
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stdin
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Standard input is empty
stdout
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; -- a          -> true
-- a ;          -> false
-- ;            -> false
--;             -> false
-;-             -> true
---;            -> false
-- semicolon ;  -> false
bla             -> false
-;--;           -> true
--;--;          -> false
--;-;           -> false
bla ; bla       -> true
https://ideone.com/U4j0q3
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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