parser of list of objects (Integers and other lists of objects) from plain text, following the "[" character as opener of a list

public List<Object> parse(String input){
	List<Object> parsed = new ArrayList<>();
	String parser = "";
	for (char c : input.toCharArray()){
		if (c == '['){
			parser += c;
			continue;
		}
		if (c == ']'){
			if (parser.length() > 1)
				parsed.add(parse(parser));
			else
				parsed.add(Integer.parseInt(parser));
			parser = "";
		}
		else
			parser += c;
	}
	return parsed;
}