Dezerialize gson custom

GsonDezerialize.java

public class CategoryDezerializer implements JsonDeserializer<ListCategory> {

	  @Override
	  public ListCategory deserialize(final JsonElement json, final Type typeOfT, final JsonDeserializationContext context)
	      throws JsonParseException {

		final JsonObject jsonObject = json.getAsJsonObject();

		final JsonElement jsonID = jsonObject.get("ID");
		final JsonElement jsonTitle = jsonObject.get("title");
		final String title = jsonTitle.getAsString();
		final String id = jsonID.getAsString();

		final JsonObject jsonAuthorsArray = jsonObject.get("author")
				.getAsJsonObject();
		final String authors = jsonAuthorsArray.get("username").toString();
		
		final ListCategory data = new ListCategory();
		data.setID(id);
		data.setTitle(title);
		data.setAuthor(authors);
		return data;
	}

}




				// Configure Gson
				GsonBuilder gsonBuilder = new GsonBuilder();
				gsonBuilder.registerTypeAdapter(ListCategory.class, new CategoryDezerializer());
				Gson gson = gsonBuilder.create();

				// Parse JSON to Java
				ListCategory[] category = gson.fromJson(array.toString(), ListCategory[].class);
				String author = category[0].getAuthor();
				String split = author.replaceAll("\"", "");
				
				System.out.println(split);