测试对象是否是参数类型的实例 [英] Test if object is instanceof a parameter type

问题描述

有没有办法确定一个对象是否是泛型类型的实例?

Is there a way to determine if an object is an instance of a generic type?

public <T> test(Object obj) {
    if (obj instanceof T) {
        ...
    }
}

这显然行不通.有替代方案吗?就像我想使用 Java 反射来实例化一个类，然后检查以确保它是泛型 T 类型.

That clearly doesn't work. Is there an alternative? Like I want to use Java reflection to instantiate a class and then check to make sure it is of type generic T.

推荐答案

执行此检查的唯一方法是您是否拥有表示类型的 Class 对象:

The only way you can do this check is if you have the Class object representing the type:

Class<T> type; //maybe passed into the method
if ( type.isInstance(obj) ) {
   //...
}

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