static FileChannel newFileChannel(int fd,String path,boolean reading,boolean writing){
  FileDescriptor fdObj=new FileDescriptor();
  fdAccess.set(fdObj,fd);
  return FileChannelImpl.open(fdObj,path,reading,writing,null);
}

static FileChannel newFileChannel ( int fd , String path , boolean reading , boolean writing ) { FileDescriptor fdObj = new FileDescriptor ( ) ; fdAccess . set ( fdObj , fd ) ; return FileChannelImpl . open ( fdObj , path , reading , writing , null ) ; }
constructs a file channel from an existing ( open ) file descriptor
