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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.util.regex.*;
  4.  
  5. class Main {
  6.  
  7.         static final String[] testcases = new String[] {
  8.         	"'Tumblr' is an amazing app",
  9. 		"Tumblr is an amazing 'app'",
  10. 		"Tumblr is an 'amazing' app",
  11. 		"Tumblr is 'awesome' and 'amazing' ",
  12. 		"Tumblr's users' are disappointed ",
  13. 		"Tumblr's 'acquisition' complete but users' loyalty doubtful"
  14.         };
  15.  
  16. 	public static void main (String[] args) throws java.lang.Exception {
  17. 		Pattern p = Pattern.compile("(?:^|\\s)'([^']*?)'(?:$|\\s)", Pattern.MULTILINE);
  18. 		for (String arg : testcases) {
  19. 			System.out.print("Input: "+arg+" -> Matches: ");
  20. 			Matcher m = p.matcher(arg);
  21. 			if (m.find()) {
  22. 				System.out.print(m.group(1));
  23. 				while (m.find()) System.out.print(", "+m.group(1));
  24. 				System.out.println();
  25. 			} else {
  26. 				System.out.println("NONE");
  27. 			}
  28. 		} 
  29. 	}
  30. }
Success #stdin #stdout 0.1s 320256KB
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Standard input is empty
stdout
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Input: 'Tumblr' is an amazing app -> Matches: Tumblr
Input: Tumblr is an amazing 'app' -> Matches: app
Input: Tumblr is an 'amazing' app -> Matches: amazing
Input: Tumblr is 'awesome' and 'amazing'  -> Matches: awesome, amazing
Input: Tumblr's users' are disappointed  -> Matches: NONE
Input: Tumblr's 'acquisition' complete but users' loyalty doubtful -> Matches: acquisition
https://ideone.com/m9t1AF
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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