枚举实现工厂模式

package com. lee.first1200 ;

public interface Car {

       public void sayName() ;
}

package com. lee.first1200 ;

public class AudiCar implements Car {

       @Override
       public void sayName() {
             System.out .println( "Audi");
       }

}
package com. lee.first1200 ;

public class BenzCar implements Car {

       @Override
       public void sayName() {
             System.out .println( "Benz");
       }
      
}
package com. lee.first1200 ;

public enum CarFactory {

      BENZ {

             @Override
             public Car create() {
                   // TODO Auto-generated method stub
                   return new BenzCar() ;
             }

       },
      AUDI {

             @Override
             public Car create() {
                   // TODO Auto-generated method stub
                   return new AudiCar() ;
             }

       },
      BMW {

             @Override
             public Car create() {
                   // TODO Auto-generated method stub
                   return new BmwCar() ;
             }

       };

       public abstract Car create();

}

package com. lee.first1200 ;

public class CarMain {

       public static void main(String [] args ) {
            CarFactory .BMW. create(). sayName();

            CarFactory .AUDI. create(). sayName();

            CarFactory .BMW. create(). sayName();
       }
}