How Can I Deserialize a List Object with Gson?

Deserializing a List Object with Gson

In an effort to transfer list objects using Google Gson, the difficulties of deserializing generic types have arisen. While attempting a solution inspired by BalusC's response, an error message indicating the need for method implementations emerged.

However, a more effective approach exists, utilizing the TypeToken class as follows:

Type listType = new TypeToken<ArrayList<YourClass>>(){}.getType();
List<YourClass> yourClassList = new Gson().fromJson(jsonArray, listType);

The TypeToken class captures a compile-time type into a java.lang.reflect.Type object, unlike a Class object that only represents a raw type. This enables the representation of any type in the Java language, including generic types.

The TypeToken class is constructed anonymously, as constructing it directly is not permitted. This is necessary to capture the type information within the anonymous subclass.

It is important to note that TypeToken can only capture types that are fully known at compile time.

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