定義：為建立一組相關或相互依賴的物件提供一個介面，而且無需指定具體類。

抽象產品類：

public abstract class Product {
    /**
     * 公共方法
     */
    public void common() {
        System.out.println("公共方法");
    }

    public abstract void detail();
}

產品實現類：

public class Car extends Product {
    @Override
    public void detail() {
        System.out.println("汽車"
 
);
    }
}
public class Plane extends Product {

    @Override
    public void detail() {
        System.out.println("飛機");
    }
}

抽象工廠介面：

public interface Creator {
    Product createCar();

    Product createPlane();

}

抽象工廠實現類：

public class CreatorImpl implements Creator {
    @Override
    public
 
 Product createCar() {
        return new Car();
    }

    @Override
    public Product createPlane() {
        return new Plane();
    }
}

測試示例：

public class Example {
    public static void main(String[] args) {
        Creator creator = new CreatorImpl();
        Product product = creator.createCar();
        product.detail();
        product = creator.createPlane();
        product.detail();
        product.common();
    }
}