import com.google.gson.Gson;

public class App {
    public static void main(String[] args) throws Exception {
        Employee emp = new Employee("Csendes Imre", "Szeged", 342);
        
        Gson gson = new Gson();
        String jsonStr = gson.toJson(emp);
        
        Employee empCopy = gson.fromJson(jsonStr, Employee.class);

        System.out.println(empCopy.name);
        System.out.println(empCopy.city);
        System.out.println(empCopy.salary);
    }
}