我会使用 isAssignableFrom 方法来确定 IsWidget 是否为超级接口：

I would use the isAssignableFrom method to determine if IsWidget is a superinterface:

return IsWidget.class.isAssignableFrom(clzz);

从上面链接的Javadoc引用：

To quote from the linked Javadoc above:

确定由此Class对象
表示的类或接口是否与指定的
类或接口相同，或是其超类或超接口类参数。

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.