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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4. import java.util.regex.Matcher;
  5. import java.util.regex.Pattern;
  6.  
  7. class Ideone
  8. {
  9. 	public static void main (String[] args) throws java.lang.Exception
  10. 	{
  11. 		String patterns[] = { 
  12. 			"(?:[^_]+)_(?:[^_]+)_(?:[^_]+)_([^_]+)", 
  13. 			".*?_.*?_.*?_([^_]+)",
  14. 			"^[^_]*_[^_]*_[^_]*_([^_]*)_"
  15. 		};
  16.  
  17. 		String s = "ABC_XYZ_123_adbc1234-ed98_1234.dat";
  18.  
  19. 		for (String p : patterns) {
  20.  
  21. 	        Pattern pattern = Pattern.compile(p);
  22.     		Matcher matcher = pattern.matcher(s);
  23.  
  24.     		if (matcher.find()) {
  25.     			System.out.println(matcher.group(1));
  26. 			}
  27. 		}
  28. 	}
  29. }
Success #stdin #stdout 0.08s 48424KB
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stdin
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Standard input is empty
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adbc1234-ed98
adbc1234-ed98
adbc1234-ed98
https://ideone.com/t9Tkya
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
secret

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