blocks|key|2750161|text|也许您应该使用以下设置来查看Unused+Symbol检查：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2750162|​|2750163|📷|atomic|2750164|2750165|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/869cebe724e49430f36451e7b0a3ac97.png|imageAlt^0|E|D|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|X|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|Y|8|@]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|K|3|G|5|6|7|12|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|M|$N|$5|O|P|Q|E|$R|S|T|-4]]]]

Maybe you should look into the <code>Unused Symbol</code> inspection with the following settings:

<img src="https://i.stack.imgur.com/t3zFX.png" alt="enter image description here">

blocks|key|2750183|text|我不确定这是否会回答你的问题，但我在过去使用了一个工具作为Fortify来运行项目的代码审查规则，它准确地指出了未使用的导入，死代码，未使用的类等。这是一个付费软件，但我相信将有一些免费的插件/软件将可用于相同的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2750184|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I am not sure if this will answer your question but I used a tool in past as Fortify to run code review rules on the project, that precisely points to the unused imports, dead code, unused classes etc. It is a paid software but I am sure there will be some free plugins/software will be available for same.

blocks|key|161706|text|我不认为这是可行的。我怀疑这个特性被故意遗漏在IDE中，因为它不能像其他“删除未使用的XXX”重构那样安全地使用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|161707|未使用的声明思想(以及AFAIK、NetBeans)寻找的是私有成员和局部变量:无法从该类或作用域外部动态访问的内容。(好吧，至少不用做不应该做的反射或JVM黑客攻击)。无论外部代码如何处理您的库，它都不会导致使用这些东西，因为它们的作用域是有限的，并且IDE可以看到所有这些东西。编译器可以通过查看您的代码来确定这一点。|161708|对于类，即使它们不具有public访问权限，也可以使用Class.forName()动态引用它们，这实际上发生在活动代码中。因此，即使它们显然没有在您的项目代码中使用，它们的使用也可能取决于您或使用库的外部代码运行的内容。因此IDE不能保证删除这些类不会改变外部可观察的行为。|offset|length|style|CODE|161709|这就是为什么我认为IDEA没有提供这种行为:它可能会给用户错误的安全期望，删除它们并不是一种安全的重构。|161710|entityMap^0|0|0|B|6|R|F|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|P|8|@$F|Q|G|R|H|I]|$F|S|G|T|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|U|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|M|$]]

I don't think this is doable. I suspect this feature is intentionally left out of IDEs because it can't be used safely the way that other "remove unused XXX" refactorings can.

The unused declarations IDEA (and AFAIK, NetBeans) looks for are for private members and local variables: things that are not accessible, even dynamically, from outside that class or scope. (Well, at least without doing things with Reflection or JVM hacking that you're not supposed to.) No matter what outside code does with your library, it won't cause those things to be used, because their scope is limited and the IDE can see all of it. The compiler can determine this by looking at just your code.

For classes, even if they don't have <code>public</code> access, they can be referenced dynamically with <code>Class.forName()</code>, and this actually happens in live code. So even if they're not apparently used within the code of your project, they might be used depending on what you or external code using your library runs. So the IDE can't guarantee that removing those classes won't change externally observable behavior.

Which is why I think IDEA just doesn't provide this behavior: it might give users false expectations of safety, and removing them is not a safe refactoring.

blocks|key|2750409|text|我发现intellij会将未实例化的类声明为未使用，即使它们实际上是在声明中使用的。因此，我通常要做的是Analyze，然后在Unused+declaration中，右键单击每个实例，然后单击find+usages。如果弹出"no+usages“，则可以安全地直接从problems菜单中删除，如下所示。这是我发现的最快的方法-否则IntelliJ+autodelte将删除已使用的类，只是没有实例化。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2750410|​|2750411|📷|atomic|2750412|2750413|注意，在gif中，你看不到弹出窗口，它告诉我没有我选择删除的这个类的用法。|2750414|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/2704f92ba79535e2a6c364b860644c7a.gif|imageAlt^0|1G|7|1R|I|0|0|0|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|11|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|12|8|@]|D|@$9|13|A|14|1|15]]|E|$]]|$1|K|3|G|5|6|7|16|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|17|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|O|$P|$5|Q|R|S|E|$T|U|V|-4]]]]

I have found that intellij will declared classes that are not instantiated as unused even if they are actually used in declarations. So what I typically do is <code>Analyze</code> and then in <code>Unused declaration</code> I right click each one and click find usages. If a popup shows up saying &quot;no usages&quot; then can safe deleted from the problems menu directly as shown below. This is the quickest way I've found - otherwise IntelliJ autodelte will remove classes that are used, just not instantiated.
<a href="https://i.stack.imgur.com/SVYUZ.gif" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SVYUZ.gif" alt="enter image description here" /></a>
Note in gif you cannot see the popup that informed me that there were no usages of this class that I chose to delete.

There is an inspection &quot;Unused declaration&quot; which can find all unused code in Intellij Idea. (see <a href="https://stackoverflow.com/questions/6587729/how-to-use-intellij-idea-to-find-all-unused-code">How to use IntelliJ IDEA to find all unused code?</a>)
But I want to find all unused classes, not methods, variables etc. Only classes. (it is difficult to find only classes in 3000 result list). How I can do that?

How find all unused classes in Intellij Idea?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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Intellij Idea中有一个检查“未使用的声明”，它可以找到所有未使用的代码。(参见)但我想找到所有未使用的类，而不是方法，变量等。只有类。(很难在3000个结果列表中只找到类)。我怎么能做到这一点？

问如何在Intellij Idea中找到所有未使用的类？
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问如何在Intellij Idea中找到所有未使用的类？EN