MainActivity.class (Realm Example)

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Realm.init(getApplicationContext());

        List<Student> students = new ArrayList<>();

        Student student = new Student();
        student.setStudentId(10001);
        student.setFirstName("Alex");
        student.setLastName("Ferguson");
        student.setGender("male");
        student.setCity("Scotland");
        student.setAge(19);
        students.add(student);

        student = new Student();
        student.setStudentId(10002);
        student.setFirstName("Ronaldo");
        student.setLastName("Santos Aveiro");
        student.setGender("male");
        student.setCity("Portugal");
        student.setAge(22);
        students.add(student);

        .
        .
        .

        for (Student stu : students) {
            StudentManager.getInstance().addStudent(stu);
        }
    }
}