From http://java.net/jira/browse/MACOSX_PORT-133 --

java.nio.file.Files .readAttributes throws NPE on MacOS

Simple test case:
import java.nio.file.attribute.DosFileAttributes;
import java.nio.ByteBuffer;
import java.nio.channels.SeekableByteChannel;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import static java.nio.file.StandardOpenOption.*;

public class Test {
public static void main(String argv[]) {
Path path = Paths.get("temp.txt");
String data = "Hello world!";
SeekableByteChannel sbc = null;

try { ByteBuffer bb = ByteBuffer.wrap(data.getBytes()); sbc = Files.newByteChannel(path, CREATE, WRITE); sbc.write(bb); DosFileAttributes dfa = null; dfa = Files.readAttributes(path, DosFileAttributes.class); } catch (Exception e) { e.printStackTrace(); }
}

}

Test output:

Exception in thread "main" java.lang.NullPointerException
at sun.nio.fs.BsdFileSystemProvider.readAttributes(BsdFileSystemProvider.java:78)
at java.nio.file.Files.readAttributes(Files.java:1669)
at TestCopy01.test01(TestCopy01.java:85)
at TestCopy01.main(TestCopy01.java:37)