Java通用算术(Java generic arithmetic)
我正在尝试创建一些Java类，它们应该使用float或double数字（出于模拟目的，我需要支持两者）。 这些类需要做一些基本的算术，还需要使用三角函数（sin，cos，atan2）。
我试图做一个通用的方法。 由于Java不允许泛型中的原始类型和
MyClass<T extends Number>确实允许Double和Float，但是基本算法不可能，我在Double和Float周围构建一个包装类。 但是，只要我需要在其中一个泛型类中实例化一个值，这种方法就会失败。是否有任何干净的方法来支持float和double，而不重复每种类型的所有代码？
I'm trying to create some Java classes, that should work with either float or double numbers (for simulation purposes I am required to support both). The classes need to do some basic arithmetic and also require use of trigonometric functions (sin, cos, atan2).
I tried to do a generic approach. As Java does not allow primitive types in generics and
MyClass<T extends Number>does indeed allow Double and Float, but makes basic arithmetic impossible, I build a wrapper class around Double and Float. But this approach fails, as soon as I need to instantiate a value in one of the generic classes.Is there any clean way to support both float and double, without duplicating all the code for each type?
原文：https://stackoverflow.com/questions/13911188
最满意答案
Joomla是一个内容管理应用程序，而Yii2是一个框架，一个很棒的框架。 如果代码的定制级别非常高，则使用应用程序或CMS标准的好处变得非常少，并且使用框架的优势很多。
通常，框架，尤其是Yii用于创建常见应用程序的特殊版本，在这些之间，CMS是更好地考虑的模块之一。 数据模型定义相当清晰，大部分工作都集中在定制功能上。
As I asked for my project, I later found answer by myself. This project that is explained would be easily defined as Web Application and not only Web site, better relation between these two is already answered here:
What's the difference between a web site and a web application?
https://en.wikipedia.org/wiki/Web_application
Declaration "If some site is Web application" is mostly based on opinion, while my explanation of project pushes it to far end to Web Application. While Joomla is somewhere in the middle to support both with ease, yii2 is constructed as base for web applications.
So why is better to stick with Joomla.
- Articles - There is article system created as 'ready to use' which is good for static pages like blog or some similar stuff, which almost all web sites needs it.
- Time - Cost. Really it might take time to get over, but still I don't know how much until I redesign it.
- Admin Expirience - might be wrong about this since with Framework programmer can create admin for only what customer really needs.
- Click&Install - I'm really reconsidering to mark as advantage when comes to some big applications. Customers tend to install alot of components/modules/plugins that makes web app working every day worse and worse.
As scaisedge said in his answer there are few benefits of using Joomla versus Yii2 in such projects since level of customization of code is high and seems that any other development comes in favor of Yii2/any framework based on same idea. This can be applied to any other similar project.
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