String json = "{\"name\":\"John\",\"age\":30,\"city\":\"New York\"}"; SJsonDecoder decoder = new SJsonDecoder(); Person person = decoder.decode(json, Person.class); System.out.println(person.getName()); // Output: John System.out.println(person.getAge()); // Output: 30 System.out.println(person.getCity()); // Output: New York Person person = new Person("John", 30, "New York"); SJsonEncoder encoder = new SJsonEncoder(); String jsonString = encoder.encode(person);