如何获得泛型定义实体的.class？ [英] How to get the .class of a Generics defined entity?

问题描述

那么如何在Java中执行以下操作？

So how can I do the following in Java?

List<String> strings = new ArrayList<String>();       
JAXBElement<List<String>> jax = new JAXBElement<List<String>>(new QName("strings"), List<String>.class, strings);

问题特别发生在List.class，返回的错误是：

The issue specifically occurs at List.class and the error returned is:

Multiple markers at this line
- List cannot be resolved to a variable
- String cannot be resolved to a variable
- Syntax error on token ">", void expected after this token

推荐答案

你不能。

最接近你想要的是使用（Class< List< String>>） List.class 。

The closest approximation to what you want is to use (Class<List<String>>) List.class.

这是因为没有 List< String> .class ，因为在运行时， List< String> ， List< Banana> ， List< FruitSalad> 和 List 在Java中都是相同的。这是故意为一大堆原因而做的，它被称为类型擦除。

This is because there is no List<String>.class, because at runtime, List<String>, List<Banana>, List<FruitSalad>, and List are all the same in Java. This is deliberately done for a whole bunch o' reasons, and it's called type erasure.

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