我在ArrayAdapter<Word>中找不到可以为空的类

public class NullableArrayAdapter<T> extends ArrayAdapter<T> {
    public NullableArrayAdapter(@NonNull Context context, int resource, @NonNull List<T> objects) {
        super(context, resource, objects);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        T item = getItem(position);
        if (item == null) {
            // 处理空值情况，例如显示一个占位符
            convertView = LayoutInflater.from(getContext()).inflate(android.R.layout.simple_list_item_1, parent, false);
            ((TextView) convertView.findViewById(android.R.id.text1)).setText("空");
        } else {
            // 正常显示数据
            convertView = super.getView(position, convertView, parent);
        }
        return convertView;
    }
}

public class WordWrapper {
    private Word word;

    public WordWrapper(Word word) {
        this.word = word;
    }

    public Word getWord() {
        return word;
    }

    public boolean isNull() {
        return word == null;
    }
}

// 在适配器中使用 WordWrapper
ArrayAdapter<WordWrapper> adapter = new ArrayAdapter<>(context, android.R.layout.simple_list_item_1, wordList);

List<Word> words = new ArrayList<>();
words.add(new Word("Apple"));
words.add(null);
words.add(new Word("Banana"));

NullableArrayAdapter<Word> adapter = new NullableArrayAdapter<>(context, android.R.layout.simple_list_item_1, words);
ListView listView = findViewById(R.id.listView);
listView.setAdapter(adapter);