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Java regular expression backslash G character

Subexpression/Meta character " \ G matches with the point at the end of the last match.

Example

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegexExample {
   public static void main(String args[]) {
      String regex = "\\G[0-9];
      Scanner sc = new Scanner(System.in);
      System.out.println("Enter a string:");
      String input = sc.nextLine();
      Pattern p = Pattern.compile(regex);
      Matcher m = p.matcher(input);
      int count = 0;
      String digits = "";
      System.out.println("Number of the previous match:");
      while(m.find()) {
         System.out.print(m.group());
         count ++;
      }
      System.out.println();
      System.out.println("Number of matches:");+count);
   }
}

Output Result

Enter a string:
555 sample text
Number of the previous match:
555
Number of matches: 3