Помогите пожалуйста, ответ верный выдаёт

for (int i = 1; i < s1.size(); i++) {

            String d = s1.get(i).substring(4);
            try {
                if (s1.get(i).contains("obj")) {
                    if (d.contains(".")) {

                        System.out.println(" ");
                        alert(Double.parseDouble(d));
                    } else {
                        System.out.println(" ");
                        alert(d);
                    }


                }
            } catch (NumberFormatException e) {

                alert(d);
            }


А вот с object ока что-то не понимаю как проверить

if (s1.get(i).contains("obj=")) {

public static boolean isDigit(String s) throws NumberFormatException {
     try {
         Double.parseDouble(s);
         return true;
     } catch (NumberFormatException e) {
         return false;
     }

public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String s = reader.readLine();
        ArrayList<String> s1 = new ArrayList<String>();
        ArrayList<String> s2 = new ArrayList<String>();
        for (String retval : s.split("\\?")) {

            for (String retvalq : retval.split("&")) {
                s1.add(retvalq);
                for (String retvalm : retvalq.split("=")) {
                    s2.add(retvalm);
                }
            }
        }
        try{
        for (int i = 1; i < s2.size(); i = i + 2) {

            System.out.print(s2.get(i)+" ");
        }
        if(isDigit(s2.get(2))){
            System.out.println(" ");
            alert(Double.parseDouble(s2.get(2)));
        } else {
            System.out.println(" ");
            alert(s2.get(2));
        }

} catch (NumberFormatException e) {

        alert(s2.get(2));


        }
    }
    public static boolean isDigit(String s) throws NumberFormatException {
        try {
            Double.parseDouble(s);
            return true;
        } catch (NumberFormatException e) {
            return false;
        }
    }

        public static void alert ( double value){
            System.out.println("double: " + value);
        }

        public static void alert (String value){
            System.out.println("String: " + value);
        }
    }

x y

lvl view name

lvl obj
String: Amigo

for (int i = 1; i < s2.size(); i=i+2) {

            System.out.print(s2.get(i)+" ");

        }
        for(int i = 0; i < s2.size();i++){
            if ((s2.get(i).equals("obj"))&&(isDigit(s2.get(i+1)))){
                System.out.println(" ");
                alert(Double.parseDouble(s2.get(i+1)));
            } else if((s2.get(i).equals("obj"))&&(!(isDigit(s2.get(i+1))))){
                System.out.println(" ");
                alert(s2.get(i+1));
            }
        }

lvl view name

lvl view Amigo

String URL = br.readLine();
String[] substr = URL.split("\\?")[1].split("&");