这是不好的编程？扫描仪作为全局变量 [英] is this bad programming ? scanner as global variable

问题描述

将一个输入扫描器（例如键盘）声明为一个类的全局变量被认为是不好的编程习惯？例如：

Is it considered bad programming practice to have an input scanner (such as a keyboard ) declared as a global var for a class? such like:

private static Scanner input  = new Scanner(System.in);

我使用各种方法输入大量数据，而且看起来好像更容易， to each method

Im working with alot of input from various methods, and just seems alot easier then having to send the keyboard to each method

推荐答案

使用全局变量似乎更容易，但从长远来看，它可以使代码很难维护，你有没有想过创建一个类来处理键盘输入？通过对问题的良好分离，您最终得到的代码更清晰。

It seems a lot easier to use a global variable, but in the long run, it can make the code very hard to maintain, have you thought about creating a class to handle the keyboard input? By having a good separation of concerns, you end up with cleaner code.

https://en.wikipedia.org/wiki/Separation_of_concerns

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