reptilesFactory.java

public interface Retile {
   void walk();
}

public class Turtle implements Reptile {
   @Override
   public void walk() {
      System.out.println("Turtle is walking!");
   }
}

public class Tortoise implements Reptile {
   @Override
   public void walk() {
      System.out.println("Tortoise is walking!");
   }
}

public class ReptileFactory {
   public Reptile getReptile(String reptileType){
      if(reptileType == null){
         return null;
      }		
      if(reptileType.equalsIgnoreCase("TURTLE")){
         return new Turtle();
      } else if(shapeType.equalsIgnoreCase("TORTOISE")){
         return new Tortoise();
      }
      return null;
   }
}

public class ReptileDemo {
   public static void main(String[] args) {
      ReptileFactory reptileFactory = new ReptileFactory();

      Reptile reptile = Reptile.getReptile("TURTLE");

      reptile.walk();
   }
}