可以 Runtime.getRuntime().availableProcessors() return 0 吗？

Question

是否存在Runtime.getRuntime().availableProcessors()returns0的特定条件？ 也许当所有处理器都忙时？

Answer 1

没有
http://docs.oracle.com/javase/8/docs/api/java/lang/Runtime.html#availableProcessors--

"the maximum number of processors available to the virtual machine; never smaller than one"

Answer 2

没有。根据文档，Runtime.availableProcessors() 永远不会 return 小于 1。

Returns: The maximum number of processors available to the virtual machine; never smaller than one

https://docs.oracle.com/javase/7/docs/api/java/lang/Runtime.html#availableProcessors()