这是真的.您的匿名类不能作为单独的类在其他类之外实现，因为它是匿名的，您甚至无法以任何方式对其进行引用.

This is quite true. Your anonymus class could not be implemented outside of other classes, as a seperate class, because as it is anonymus you would not be even able to refer to it in any way.

其他信息: 来自JLS:匿名类始终是内部类(第8.1.3节)；它永远不会是静态的(第8.1.1节，第8.5.1节).

Additional information: From JLS: An anonymous class is always an inner class (§8.1.3); it is never static (§8.1.1, §8.5.1).