read all data from two specific column in Realm Database (Android)

iam using below mentioned code for returning all the columns from Realm database. but i want to fetch only First name & Age column data from same table. Kindly help me to achieve this. thanks in advance.

RealmResults<Data>data1=realm2.where(Data.class).findAll();
        for (Data DatamNew :data1)
        {
            arrayList.add(DatamNew);
        }

from read all data from two specific column in Realm Database (Android)