Serializing & Deserializing Json Using Gson

Serialization (Object → JSON)

Gson gson = new Gson();
User user = new User("Asha", 28);
String json = gson.toJson(user);
// {"name":"Asha","age":28}

Deserialization (JSON → Object)

String json = "{\"name\":\"Asha\",\"age\":28}";
User user = gson.fromJson(json, User.class);
System.out.println(user.name); // Asha

Why This Matters for Testing

Serialization builds request bodies without manual string concatenation, and deserialization turns a response directly into an object whose fields can be asserted on with normal Java code.