返回布尔值的Java方法的命名约定(无问号) [英] Naming conventions for java methods that return boolean(No question mark)

问题描述

我喜欢在其他语言的方法/函数名称的末尾使用问号. Java不允许我这样做.作为一种解决方法，我还能如何用Java命名布尔返回方法?在某些情况下，在方法前面使用is，has，should，can听起来不错.是否有更好的方法来命名此类方法?

I like using question mark at the end of method/function names in other languages. Java doesn't let me do this. As a workaround how else can I name boolean returning methods in Java? Using an is, has, should, can in the front of a method sound okay for some cases. Is there a better way to name such methods?

例如createFreshSnapshot?

For e.g. createFreshSnapshot?

推荐答案

惯例是以名称提出问题.

The convention is to ask a question in the name.

以下是一些可以在JDK中找到的示例:

Here are a few examples that can be found in the JDK:

isEmpty()

hasChildren()

这样，名称的读取方式就像它们的末尾带有问号一样.

That way, the names are read like they would have a question mark on the end.

收藏集是否为空?
这个节点有孩子吗?

Is the Collection empty?
Does this Node have children?

然后，true表示是，false表示否.

And, then, true means yes, and false means no.

或者，您可以将其读为断言:

Or, you could read it like an assertion:

该收藏集为空.
该节点有孩子

The Collection is empty.
The node has children

注意:
有时您可能想为方法命名，例如createFreshSnapshot?.没有问号，该名称意味着该方法应创建快照，而不是检查是否需要快照.

Note:
Sometimes you may want to name a method something like createFreshSnapshot?. Without the question mark, the name implies that the method should be creating a snapshot, instead of checking to see if one is required.

在这种情况下，您应该重新考虑您的实际要求.诸如isSnapshotExpired之类的名字更好，它传达了该方法在调用时将告诉您的内容.遵循这样的模式还可以使您的更多功能保持纯净而没有副作用.

In this case you should rethink what you are actually asking. Something like isSnapshotExpired is a much better name, and conveys what the method will tell you when it is called. Following a pattern like this can also help keep more of your functions pure and without side effects.

如果您执行使用Java API中isEmpty()的Google搜索，您会得到很多结果.

If you do a Google Search for isEmpty() in the Java API, you get lots of results.

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