String inputStr = "abbabcd";
String patternStr = "(a(?:b*))+(c*)";
// (?:b*) is a non-capturing group

// Compile and use regular expression
Pattern pattern = Pattern.compile(patternStr);
Matcher matcher = pattern.matcher(inputStr);
boolean matchFound = matcher.find();

if (matchFound) {
    // Get all groups for this match
    for (int i=0; i<=matcher.groupCount(); i++) {
        String groupStr = matcher.group(i);
    }
    // group 0: abbabc
    // group 1: ab
    // group 2: c
}