find the starting point of the first subgroup : Group « Regular Expressions « Java






  1. Java
  2. Regular Expressions
  3. Group

find the starting point of the first subgroup


import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
  public static void main(String args[]) {
    Pattern p = Pattern.compile("t(est)");
    String candidateString = "This is a test. This is another test.";
    Matcher matcher = p.matcher(candidateString);

    int nextIndex = matcher.start(1);
    System.out.println(candidateString);
    System.out.println(nextIndex);

  }
}








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