Design patterns [RESOLVIDO]

abstract class WidgetFactory

 {

     public static WidgetFactory obterFactory()

     {

 

         if( Configuracao.obterInterfaceGraficaAtual() == Configuracao.MotifWidget )

         {

             return new MotifWidgetFactory();

         }

         else

         {

             return new QtWidgetFactory();

         }

    }

 

    public abstract Botao criarBotao();

 }

 

 class MotifWidgetFactory extends WidgetFactory

 {

     public Botao criarBotao()  {

         return new BotaoMotif();

     }

 }

 

 class QtWidgetFactory extends WidgetFactory

 {

     public Botao criarBotao()  {

         return new BotaoQt();

     }

  }

 

 abstract class Botao

 {

     public abstract void desenhar();

 }

 

 class BotaoMotif extends Botao

 {

     public void desenhar()  {

        System.out.println("Eu sou um botao Motif!");

     }

 }

 

 class BotaoQt extends Botao

 {

     public void desenhar()  {

        System.out.println("Eu sou um botao Qt!");

     }

 }

 

 public class Cliente

 {

     public static void main(String[] args)

     {

         WidgetFactory factory = WidgetFactory.obterFactory();

 

         Botao botao = factory.criarBotao();

         botao.desenhar();

     }

 }