TestRegexp

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

public class TestRegexp {

    public static void main(String[] args) {
        String src = "import java.util.regex.Matcher;\r\n" + "import java.util.regex.Pattern;";
        String regex = "(util)(.*)(Pattern)";
        Pattern p = Pattern.compile(regex, Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.COMMENTS);
        Matcher m = p.matcher(src);
        int n = m.groupCount();
        System.err.println(n);
        while (m.find()) {
            for (int i = 0; i < n; i++) {
                System.out.println(i + "===========" + m.group(i + 1));
            }
        }
    }
}