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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.*;
  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 s = "Вася сегодня съел 123456 яблок";
  13. String regex = "\\b\\d{4,7}\\b";
  14. Pattern pattern = Pattern.compile(regex);
  15. Matcher matcher = pattern.matcher(s);
  16. while (matcher.find()){
  17. System.out.println(matcher.group(0));
  18. }
  19. }
  20. }
Success #stdin #stdout 0.05s 4386816KB
stdin
Standard input is empty
stdout
123456