Calling a group of methods from different classes in eclipse -

i'm new programming in eclipce android, , i'm little lost, i'm trying make application multiple screens, same menus, fact have created several classes , each class several methods, want include same methods in each class, can encapsulate group of methods 1 , call them different classes..

here methods repeated in each class

public void lanzarconfig(view view){       intent = new intent(this, config.class);    startactivity(i);     }  public void lanzarconsola(view view){       intent = new intent(this, consola.class);   startactivity(i);     }  public void lanzaracercade(view view){       intent = new intent(this, acercade.class);    startactivity(i);     }  public void lanzarsalir(view view){       intent = new intent(this, salir.class);   startactivity(i);     }  @override public boolean oncreateoptionsmenu(menu menu) {        super.oncreateoptionsmenu(menu);        menuinflater inflater = getmenuinflater();        inflater.inflate(r.menu.menu, menu);        return true;      }      @override public boolean onoptionsitemselected(menuitem item) {              switch (item.getitemid()) {               case r.id.acercade:                     lanzaracercade(null);                     break;               case r.id.config:                     lanzarconfig(null);                     break;               case r.id.consola:                     lanzarconsola(null);                     break;               case r.id.salir:                     lanzarsalir(null);                     break;               }              return true;      } 

how call them other classes without having copy entire code..?

save these methods in new class classname , use inheritance:

public class whateverclass extends classname 

every instance of class whateverclass can use methods of class classname.

read more inheritance here.