设计模式之 抽象工厂模式

abstract class AbstractProductA {

}

abstract class AbstractProductB {

}

class ProductA1 extends AbstractProductA {

}

class ProductA2 extends AbstractProductA {

}

class ProductB1 extends AbstractProductB {

}

class ProductB2 extends AbstractProductB {

}

abstract class AbstractFactory {
    public abstract AbstractProductA createProductA();

    public abstract AbstractProductB createProductB();

}

class Factory1 extends AbstractFactory {

    @Override
    public AbstractProductA createProductA() {
        return new ProductA1();
    }

    @Override
    public AbstractProductB createProductB() {
        return new ProductB1();
    }

}

class Factory2 extends AbstractFactory {

    @Override
    public AbstractProductA createProductA() {
        return new ProductA2();
    }

    @Override
    public AbstractProductB createProductB() {
        return new ProductB2();
    }
}

public class Client {
    public static void main(String[] args) {
        AbstractFactory factory1 = new Factory1();
        AbstractFactory factory2 = new Factory2();
        AbstractProductA a1 = factory1.createProductA();
        AbstractProductA a2 = factory2.createProductA();
        AbstractProductB b1 = factory1.createProductB();
        AbstractProductB b2 = factory2.createProductB();
    }
}