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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. import java.util.regex.Matcher;
  7. import java.util.regex.Pattern;
  8.  
  9. /* Name of the class has to be "Main" only if the class is public. */
  10. class Ideone
  11. {
  12. 	public static void main (String[] args) throws java.lang.Exception
  13. 	{
  14. 		Pattern r = Pattern.compile("(?<!\\S)P(?:O|\\.O\\.)\\h*#\\h*(\\d+)");
  15. 	    String[] strings = {
  16. 	    	"PO # 123456",
  17. 			"PO# 123456",
  18. 			"PO #123456",
  19. 			"P.O. # 123456",
  20. 			"P.O.# 123456",
  21. 			"P.O. #123456",
  22. 			"Product: Multi Screen Encoder Version: 3.51.10 (008) Order Number: 0030000a9Ddy PO # 129999 Comment: some comments"
  23. 	    };
  24. 	    for(String str : strings) {
  25.     	  Matcher rm = r.matcher(str);
  26. 	      if(rm.find()) {
  27. 	    	System.out.println(rm.group(1));
  28. 	    	}
  29. 	    }
  30. 	}
  31. }
Success #stdin #stdout 0.04s 2184192KB
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Standard input is empty
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123456
123456
123456
123456
123456
123456
129999
https://ideone.com/sPe9CK
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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