Awesome App

app_problem.java

//AwesomeApp
class User {
    String firstName;
    String lastName;
    String city;
}
...
public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        User g = new User("Gandalf", "The White", "Maia");

        Log.d("User", "firstName = "+g.firstName+ " lastname = "+g.lastName+" city = "+g.city);
    }
}