如何通过反射获取HashSet的元素？-HowcanIgetanelementofaHashSetwithreflection?

1  

Your question is quite unclear, but in this code

您的问题很不清楚,但在此代码中

new HashSet();

you have no chance to get the Foo part via reflection. Period. The relevant search term is "type erasure".

你没有机会通过反思获得Foo部分。期。相关搜索词是“类型擦除”。

0  

The method to obtain the Foo is:

获得Foo的方法是:

ParameterizedType listType = (ParameterizedType) field.getGenericType();
Class stringListClass = (Class) listType.getActualTypeArguments()[0];

But you must be sure that field is an Array/Collection/HashSet, else, will be an exception.

但是你必须确保该字段是一个Array / Collection / HashSet,否则将是一个例外。