看了下File类JDK文档的说明，摘录如下：
An abstract representation of file and directory pathnames.User interfaces and operating systems use system-dependent pathname strings to name files and directories. This class presents an abstract, system-independent view of hierarchical pathnames. An abstract pathname has two components:

1.An optional system-dependent prefix string, such as a disk-drive specifier, "/" for the UNIX root directory, or "\\\\" for a Microsoft Windows UNC pathname, and
2.A sequence of zero or more string names.

The prefix of a UNC pathname is "\\\\"; UNC路径是什么意思？UNC路径的前缀是"\\\\"，能否举个例子？
[ 本帖最后由 孙斌 于 2011-07-22  01:12 编辑 ]

"\\\\"，其中有第一个和第三个\是转义字符，所以"\\\\"==“\\”。这是指微软文件系统盘符后跟的标识，如C：\\softer\it168。