关键字“类”在声明中 [英] Keyword "class" in declaration
问题描述
我在面试中遇到了一个相当简单的问题。
I faced a rather simple question in an interview.
为什么我们使用类用于声明类的关键字？
Why do we use the class keyword for declaring classes?
推荐答案
简答：因为这是在C ++中完成的方式。 Java已经从C ++中采用了大部分语法 - 在我看来，这是一个明智的决定，因为它真的有助于绘制程序员，当它还是新的时候。
Short answer: because that's the way it's done in C++. Java has taken the bulk of its syntax from C++ - a wise decision, in my opinion, as it really helped with drawing programmers when it was still new.
现在，如果你的问题是为什么一个关键字根本就需要 - 也就是为什么编译器不能推断出声明类的位置 - 也许它可以，但是使用关键字可以带来好处
Now, if your question is why a keyword is needed at all - i.e. why can't the compiler just deduce where classes are declared - maybe it can, but using a keyword has the benefits of
- 更容易编译。
- 比隐式声明对人类更具可读性。
- 正如我上面所说 - 类似于C ++语法。
编辑：另外一件事 - 有些事情只是不能由编译器在Java语法中推断 - 例如，空类和空接口（在Java中都是合法的）之间的唯一区别是类 / interface keyword。
one other things - some things simply cannot be deduced by the compiler in the Java syntax - for example, the only difference between an empty class and an empty interface (both legal in Java) is the class / interface keyword.
这篇关于关键字“类”在声明中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
