英文:
Why is the catch Exception always called e
问题
例如：
尝试 {
int n = scan.nextInt();
System.out.println("\n你输入的数字是：" + n);
} catch (Exception e) {
System.out.println("你输入了一个无效的值。");
}
似乎每个带有 `catch` 语句的程序中都将异常称为 `Exception`，这是一种不成文的规则吗？
英文:
For example:
try {
int n = scan.nextInt();
System.out.println("\nYour number is: "+n);
}catch(Exception e) {
System.out.println("You entered a value thats not valid.");
It seems like every program with a catch statement in it has the Exception called e. Is this like an unwritten rule or something?
答案1
得分: 2
因为惯例。给事物命名很难。拥有共同的词汇有助于理解彼此的代码。
英文:
Because of conventions. Naming things is hard. Having a common vocabulary helps understanding each other's code.
答案2
得分: 2
在我看来，没有这样的规定，只是更短而已...这取决于你和你的编程习惯。
英文:
IMHO, no there is no such rule, it is just shorter like that... It is up to you and to your programming habit.
答案3
得分: 2
驼峰命名法通常在Java中使用的原因相同，你可以使用蛇形命名法，但不建议，因为出于某种原因会使你的代码难以阅读。
String helloWorld;
String hello_world; //看起来有点奇怪，不是吗？
英文:
The same reason why camelCase is generally used in java for naming, you can use snake_case but it's not recommended and makes your code harder to read for whatever reason.
String helloWorld;
String hello_world;//seems a bit off doesn't it.
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