Can one class extend two classes?

Question

My class should extend two classes at the same time:

public class Preferences extends AbstractBillingActivity {

public class Preferences extends PreferenceActivity {

How to do so?

Upd. Since this is not possible, how should I use that AbstractBillingActivity with Preferences then?

Upd2. If I go with interfaces, should I create:

1. BillingInterface

   public interface BillingInterface extends PreferenceActivity, AbstractBillingActivity {
   
   }
   

2. PreferenceActivity

   public interface PreferenceActivity {
   
   }
   

3. AbstractBillingActivity

   public interface AbstractBillingActivity {
   
           void onCreate(Bundle savedInstanceState);
   
   }
   

and then

public class Preferences implements BillingInterface {

Answer 1

If you are interested in using methods from multiple classes, the best way to approach to it is to use Composition instead of Inheritence