获取在包中声明的所有Java类的名称 [英] Getting the names of all Java classes declared in a package

问题描述

我正在写一个功能，这将有助于在我的程序的某个包中获取类。此外，我只想要一个类的子类的某个类。

我需要类为了调用静态方法。

有自动的方法吗？

如果我不清楚，我想要的是这样的：

  ArrayList< Class< ;? extends MySuperClass>> classes =; 
 
 classes.add（MyClass.class）; 
 classes.add（MyClass2.class）; 
  

而不是必须为每个类调用add，我想自动获得该类列表。 / p>

类的数量很小，所以我不介意自动手动声明它们，如果自动技巧会很慢 - 这个应用程序是一个移动平台。

无论如何，我也想知道如何为ArrayList中的每个方法调用静态方法：

  // error类的方法nameOfStaticMethod未定义类< capture＃2-of？ extends MySuperClass> 
 classes.get（0）.nameOfStaticMethod（）;感谢您的意见。
解决方案
 Java不提供此功能。在包级别没有内省。这些类可以是数据库中的记录，或者是网络连接的另一侧。 
 
 
 
您可以使用自定义类加载器和API来提供一种方法来列出类名。
 
I'm writing a functionality where it would be helpful to get the classes inside a certain package of my program. Also, I only want the classes that subclass a certain class.

I need the classes in order to call static methods on them.

Is there an automatic way to do this? If so, is it slow?

In case I was not clear, what I want is something like this:
ArrayList<Class<? extends MySuperClass>> classes = ;

classes.add(MyClass.class); 
classes.add(MyClass2.class); 
Instead of having to call add for each class, I would like to automatically get that class list.

The number of classes is small, so I would not mind declaring them manually if the automatic trick would be slow - this app is for a mobile platform.

In either way, I would also like to know how to call the static method for each method in the ArrayList:
  // error The method nameOfStaticMethod is undefined for the type Class<capture#2-of ? extends MySuperClass>
  classes.get(0).nameOfStaticMethod (); 
Thanks for your comments.
解决方案
Java doesn't provide this ability. There is no introspection at the package level. The classes could be records in a database, or on the other side of a network connection. There's no requirement for them to be stored and organized so as to facilitate enumerating them by package.

You could make a custom class loader and API to provide a method of listing the class names.

                        
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