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Regular Expression "G" Metacharacter in Java
The subexpression/metacharacter “\G” matches the point where the last match finished.
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("Digits in the previous match:"); while(m.find()) { System.out.print(m.group()); count ++; } System.out.println(); System.out.println("Number of matches: "+count); } }
Output
Enter a string: 555 sample text Digits in the previous match: 555 Number of matches: 3
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