java - 非关键资源有哪些示例？

Question

引自 Effective Java指出:

A second legitimate use of finalizers concerns objects with native peers. A native peer is a native object to which a normal object delegates via native methods. Because a native peer is not a normal object, the garbage collector doesn’t know about it and can’t reclaim it when its Java peer is reclaimed. A finalizer is an appropriate vehicle for performing this task, assuming the native peer holds no critical resources.

我以前没有用过 C++，但我隐约意识到文件处理程序和数据库连接是关键资源。但是，资源非关键究竟意味着什么？

或者更确切地说，有哪些非关键资源的示例？

Answer 1

“非关键资源”不存在。这句话不是在谈论非关键资源，它只是在谈论关键资源的缺失。

在某种程度上，您可以说内存是垃圾收集系统中的非关键资源。但是，我不相信这是正确的(事实上恰恰相反:托管资源在用完时仍然很重要)，而且我从未听说过这种说法。