工厂模式--简单工厂

学习设计模式的几点说明：1）应用场景；2）UML类图；3）代码。

 

关于工厂模式中简单工厂代码。

package test6.simpleFactory;

import org.junit.Test;

abstract class Car {
	public abstract void printName();
}

class BenzCar extends Car {

	@Override
	public void printName() {
		System.out.println("Benz Car...");
		
	}
	
}

class BMWCar extends Car {

	@Override
	public void printName() {
		System.out.println("BMW Car...");
		
	}
	
}

class CarFactory {
	public static final int BENZ_CAR = 1;
	public static final int BMW_CAR = 2;

	public static Car createCarFactor(int type) {
		if(type == CarFactory.BENZ_CAR) {
			return new BenzCar();
		} else if (type == CarFactory.BMW_CAR) {
			return new BMWCar();
		}
		return null;
	}
}

public class Application {
	@Test
	public  void test() {
		Car car = CarFactory.createCarFactor(CarFactory.BENZ_CAR);
		car.printName();
		
		car = CarFactory.createCarFactor(CarFactory.BMW_CAR);
		car.printName();
	}
	
}