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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. String text = "um2tres4cinco6sete8";
  15.  
  16. String regex = "[0-9]";
  17.  
  18. Pattern p = Pattern.compile(regex);
  19. Matcher m = p.matcher(text);
  20.  
  21. while(m.find()){
  22. System.out.println(m.group());
  23. }
  24. System.out.println("Total de grupos: " + m.groupCount());
  25. }
  26. }
Success #stdin #stdout 0.05s 711168KB
stdin
Standard input is empty
stdout
2
4
6
8
Total de grupos: 0