在java中难以读取整数？它背后有什么理由吗？ [英] Hard to read integers in java? Is there any reason behind it?

问题描述

我必须在Java中更频繁地读取整数。那我该怎么办？我必须使用什么功能？

I have to read integers more frequently in Java. So how i should do? What function i have to use?

C / C ++也有缓冲概念，但它们只有一个语句。但是在Java中我们必须调用至少2个函数来读取整数。

C/C++ too have buffering concepts but they has a single statement. But in Java we have to call at least 2 function to read an integer.

例如，

要从控制台读取整数，

我将使用

• scanf in C


• cin in C ++

• scanf in C
• cin in C++

但在Java中，

BufferedReader bufferedreader = new BufferedReader(
    new InputStreamReader(System.in)); String number = bufferedreader.readLine();

int value = Integer.parseInt(number);

或

Scanner scan = new Scanner(System.in); 
int i = scan.nextInt();

有人请解释一下：我能否拥有比更简单的版本？ cin 或 scanf （单行声明）。

Someone please explain me: Can I have a simpler version than these similar to cin or scanf (A one line statement).

提前致谢。

推荐答案

我相信 Scanner 提供最简单的界面。我不相信标准API提供了更简单的方法。 （你当然可以将片段封装在一个方法中，然后调用该方法。）

I believe Scanner provides the simplest interface. I don't believe there is a simpler approach provided by the standard API. (You could of course encapsulate the snippet in a method, and call the method instead.)

我能想出的唯一一个明显的

The only one-liner I can come up with is the obvious

int i = new Scanner(System.in).nextInt();

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