使用 Google Reflections 获取所有类的列表——但 java.* 似乎丢失了
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Using Google Reflections to get a list of all classes -- but java.* seems to be missing
提问by pinecone
I am using the google Reflections package to build an index of all classes that are available for calling. The following code is supposed to return all classes that are loaded in the JVM:
我正在使用 google Reflections 包来构建可供调用的所有类的索引。以下代码应该返回在 JVM 中加载的所有类：
List<ClassLoader> classLoadersList = new LinkedList<ClassLoader>();
classLoadersList.add(ClasspathHelper.contextClassLoader());
classLoadersList.add(ClasspathHelper.staticClassLoader());
Reflections reflections = new Reflections(new ConfigurationBuilder()
.setScanners(new SubTypesScanner(false), new ResourcesScanner())
.setUrls(ClasspathHelper.forClassLoader(classLoadersList.toArray(new ClassLoader[0]))));
Set<Class<? extends Object>> allClasses =
reflections.getSubTypesOf(Object.class);
I note that the set it returns does not contain anything in the java.* domain. Can someone familiar with the Reflections package advise me on how to get these as well? Thanks!
我注意到它返回的集合在 java.* 域中不包含任何内容。熟悉 Reflections 包的人能否也告诉我如何获得这些？谢谢！
采纳答案by artbristol
Not all classes are loaded by a normal classloader; some are loaded by the bootstrap classloader to speed things up, and this can be coded natively (and hence inaccessible from Java code). See this message:
并非所有类都由普通类加载器加载；有些是由引导类加载器加载以加快速度，这可以本地编码（因此无法从 Java 代码访问）。看到这条消息：
http://lists.jboss.org/pipermail/jboss-development/2008-April/011943.html
http://lists.jboss.org/pipermail/jboss-development/2008-April/011943.html
See this question for alternatives
请参阅此问题以获取替代方案
回答by zapp
Google Reflections can be used to get all classes, including java.*, although it's not its primarily use.
Google Reflections 可用于获取所有类，包括 java.*，尽管它不是主要用途。
Reflections reflections = new Reflections(
ClasspathHelper.forClass(Object.class),
new SubTypesScanner(false));
And than:
然后：
Set<String> allClasses =
reflections.getStore().getSubTypesOf(Object.class.getName());
