java - 是否有 Class.isAssignableFrom 与 Type 对象一起使用的替代方法？

Question

在 Java 中， Class 有一个 isAssignableFrom method定义如下:

public boolean isAssignableFrom(Class<?> cls)

Determines if the class or interface represented by this Class object is either the same as, or is a superclass or superinterface of, the class or interface represented by the specified Class parameter. It returns true if so; otherwise it returns false. If this Class object represents a primitive type, this method returns true if the specified Class parameter is exactly this Class object; otherwise it returns false.

Specifically, this method tests whether the type represented by the specified Class parameter can be converted to the type represented by this Class object via an identity conversion or via a widening reference conversion. See The Java Language Specification, sections 5.1.1 and 5.1.4 , for details.

Parameters:

cls - the Class object to be checked

Returns:

the boolean value indicating whether objects of the type cls can be assigned to objects of this class

Class实现 Type界面。有没有等价的 isAssignableFrom适用于 Type 的方法s 而不仅仅是 Class是吗？例如，是否有一种方法可以确定类型为 List<String> 的变量是否存在？ (将通过 ParameterizedType 的实例表示)可以分配给 List<? extends Object> 类型的变量？

Answer 1

看看javaRuntype -- 我发现它很有用。它可以根据 java.lang.reflect.Type 的实例生成类型表示，并测试它们之间的可分配性。