我正在嘗試將 json 文件中的數(shù)據(jù)讀取到我的家庭課程中。當(dāng)我嘗試訪問(wèn)數(shù)據(jù)時(shí)，我收到 NPEGson gson = new Gson();    try (Reader reader = new FileReader("family.json")) {        Family family = gson.fromJson(reader, Family.class);        System.out.println(family.toString());    } catch (IOException e) {        e.printStackTrace();    }家庭班public class Family {List<Person> people;人物類public class Person {private String firstname;private String lastname;json 文件{ "members" : [{"firstname":"asdf", "lastname":"asdf"}, {"firstname":"qwer", "lastname":"qwer"}, {"firstname":"fghj", "lastname":"fghj"}]}任何幫助/提示將不勝感激