设计模式factory_method

package factory_method; interface Factory { Car createCar(); }
package factory_method; public class BMWFactory implements Factory{ public Car createCar(){ return new BMW(); } public static void main(String[] args) { Factory factory=new BMWFactory(); System.out.println(factory.createCar()); } }
package factory_method; public interface Car { }
package factory_method; public class BMW implements Car{ }