有一个OEM制造商代理做HP笔记本电脑(Laptop)，后来该制造商得到了更多的品牌笔记本电脑的订单Acer，Lenovo，Dell，该OEM商发现，如果一次同时做很多个牌子的本本，有些不利于管理。利用工厂模式改善设计，用JAVA语言实现 (或C#控制台应用程序实现)该OEM制造商的工厂模式。绘制该模式的UML图。
【模式UML图】

【代码】

/**
 * ClassName Main
 * Description
 *
 * @author 石都林
 * @date 2021/6/17 9:03
 * Version 1.0
 */
public class Main {
    private final static LevonoFactory LENOVO = new LevonoFactory();
    private final static DellFactory DELL = new DellFactory();
    private final static AcerFactory ACER = new AcerFactory();

    public static void main(String[] args) {
        LENOVO.getComputerType().computerType();
        DELL.getComputerType().computerType();
        ACER.getComputerType().computerType();
    }

}
 interface Computer {
     abstract void computerType();
 }
 interface ComputerFactory {
    abstract Computer getComputerType();
}
class Lenovo implements Computer{
    @Override
    public void computerType() {
        System.out.println("computer type is Lenovo!");
    }
}
 class Dell implements Computer{
    @Override
    public void computerType() {
        System.out.println("computer type is dell!");
    }
}
 class Acer implements Computer{
    @Override
    public void computerType() {
        System.out.println("computer type is Acer!");
    }
}
 class AcerFactory implements ComputerFactory{
    @Override
    public Computer getComputerType() {
        return new Acer();
    }
}
 class DellFactory implements ComputerFactory{
    @Override
    public Computer getComputerType() {
        return new Dell();
    }
}
 class LevonoFactory implements ComputerFactory{
    @Override
    public Computer getComputerType() {
        return new Lenovo();
    }
}

【运行截图】