build 14
--------
FileChannel.write(ByteBuffer src,long position) accepts position = -1 . Also the postion of filechannel is modified after the execution.
It does not accept other non-negative values.

outputs:
if postion is -1
----------------
byte written- > 1000
size- > 1000
position- > 1000 -->the postion is modified

if postion is 1
----------------
byte written- > 1000
size- > 1001
position- > 0

if postion is -2
-----------------
FAIL java.io.IOException: Invalid argument
java.io.IOException: Invalid argument
        at sun.nio.ch.FileDispatcher.pwrite0(Native Method)
        at sun.nio.ch.FileDispatcher.pwrite(FileDispatcher.java:45)
        at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:96)
        at sun.nio.ch.IOUtil.write(IOUtil.java:74)
        at sun.nio.ch.FileChannelImpl.write(FileChannelImpl.java:609)
        at FCWrite.main(FCWrite.java:16)


The testcase FCWrite.java is attached