Json Library: Java

ObjectMapper mapper = new ObjectMapper(); User user = new User("Alice", 30); String json = mapper.writeValueAsString(user); System.out.println(json); // Output: "name":"Alice","age":30

JSONArray hobbies = new JSONArray(); hobbies.put("reading"); hobbies.put("swimming"); obj.put("hobbies", hobbies); json library java

// Serialize User user = new User("Frank", 45); String json = jsonb.toJson(user); ObjectMapper mapper = new ObjectMapper(); User user =

JSON (JavaScript Object Notation) has become the lingua franca of data exchange in modern web services, configuration files, and NoSQL databases. If you're a Java developer, you've likely faced the question: Which JSON library should I use? ObjectMapper mapper = new ObjectMapper()

import org.json.JSONObject; import org.json.JSONArray; JSONObject obj = new JSONObject(); obj.put("name", "David"); obj.put("age", 40);

// Deserialize User result = jsonb.fromJson(json, User.class); | Library | Serialization Speed | Deserialization Speed | Memory Usage | |---------|--------------------|----------------------|---------------| | Jackson | Fastest | Fastest | Moderate | | Gson | Fast | Fast | Low | | JSON-java | Slow | Slow | High (creates many objects) | | JSON-B (Yasson) | Moderate | Moderate | Moderate |

@JsonIgnoreProperties(ignoreUnknown = true) public class User // ...