Lab3.java

import java.util.regex.*;

public class Lab3 {
    private static void test_match(String text) {
        String stringLiteral = "`(`{2}|[.\\s])*`";
        String numLiteral = "[0-9]+|[01]+b";
        String ident = "[\\?\\*\\|][0-9\\?\\*\\|]";
        String pattern = "(^" + stringLiteral + ")|(^" + numLiteral + ")|(^" + ident + ")";

        Pattern p = Pattern.compile(pattern);
        Matcher m = p.matcher(text);

        if (m.find()) {
//           if (m.group(1) != null)
        } else {
            System.out.println("ERROR");
        }
    }

    public static void main(String args[]) {
        test_match("`123123adsf2323fg2qy3h4wrhpidsrfug89u29jtwgv`");
    }
}