7086489: File.lastModified should accuracy as well as resolution
Summary: Add an @apiNote indicating that the last-modified time might be of coarser than millisecond granularity.
Reviewed-by: smarks
--- a/jdk/src/java.base/share/classes/java/io/File.java Wed May 17 08:51:46 2017 -0400
+++ b/jdk/src/java.base/share/classes/java/io/File.java Wed May 17 14:29:26 2017 -0700
@@ -923,6 +923,12 @@
* java.nio.file.Files#readAttributes(Path,Class,LinkOption[])
* Files.readAttributes} method may be used.
*
+ * @apiNote
+ * While the unit of time of the return value is milliseconds,
+ * the granularity of the value depends on the underlying
+ * file system and may be larger. For example, some
+ * file systems use time stamps in units of seconds.
+ *
* @return A <code>long</code> value representing the time the file was
* last modified, measured in milliseconds since the epoch
* (00:00:00 GMT, January 1, 1970), or <code>0L</code> if the