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  1. import java.util.regex.Matcher;
  2. import java.util.regex.Pattern;
  3.  
  4. public class Main
  5. {
  6.    static void printMatch(String regex, String str, int... groups)
  7.    {
  8.       System.out.println("String = " + str);
  9.       System.out.println("Regex = " + regex);
  10.       Pattern p = Pattern.compile(regex);
  11.       Matcher m = p.matcher(str);
  12.       if (m.matches())
  13.          for (int i: groups)
  14.             System.out.println("Group " + i + " = " + m.group(i));
  15.       System.out.println();
  16.    }
  17.  
  18.    public static void main(String[] args)
  19.    {
  20.       printMatch("^((\\+|00)(\\d{1,3})[\\s-]?)?(\\d{10})$", "+123-9854875847", 3, 4);
  21.       printMatch("^(?:(?:\\+|00)(\\d{1,3})[\\s-]?)?(\\d{10})$", "+123-9854875847", 1, 2);
  22.       // group not in match -> just prints 'null'
  23.       printMatch("^(?:(?:\\+|00)(\\d{1,3})[\\s-]?)?(\\d{10})$", "9854875847", 1, 2);
  24.    }
  25. }
  26.  
Success #stdin #stdout 0.07s 380160KB
comments (?)
stdin 
Standard input is empty
stdout 
String = +123-9854875847
Regex = ^((\+|00)(\d{1,3})[\s-]?)?(\d{10})$
Group 3 = 123
Group 4 = 9854875847

String = +123-9854875847
Regex = ^(?:(?:\+|00)(\d{1,3})[\s-]?)?(\d{10})$
Group 1 = 123
Group 2 = 9854875847

String = 9854875847
Regex = ^(?:(?:\+|00)(\d{1,3})[\s-]?)?(\d{10})$
Group 1 = null
Group 2 = 9854875847
https://ideone.com/fhCrpu
language:
Java (HotSpot 12)
created:
12 years ago
visibility:
secret

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