java regex matches get index

1
2import java.util.regex.Matcher;
3import java.util.regex.Pattern;
4
5public class Main {
6  public static void main(String[] argv) throws Exception {
7
8    CharSequence inputStr = "abbabcd";
9    String patternStr = "(a(b*))+(c*)";
10
11    Pattern pattern = Pattern.compile(patternStr);
12    Matcher matcher = pattern.matcher(inputStr);
13    boolean matchFound = matcher.find();
14
15    if (matchFound) {
16      // Get all groups for this match
17      for (int i = 0; i <= matcher.groupCount(); i++) {
18        // Get the group's captured text
19        String groupStr = matcher.group(i);
20
21        // Get the group's indices
22        int groupStart = matcher.start(i);
23        int groupEnd = matcher.end(i);
24
25        // groupStr is equivalent to
26        inputStr.subSequence(groupStart, groupEnd);
27      }
28    }
29  }
30}
31
32 
33