getFile(String relativePath) Retrieve a file from the filesystem for reading.
Parameters: relativePath - the path to the file relative to the filesystemroot.
Retrieve a file from the filesystem for reading.
Parameters: relativePath - the path to the file relative to the filesystemroot. a channel which points to the contents of the file. throws: FileNotFoundException - if the specified file cannot be found,the provided path points to a directory or to a file from whichcannot be read. throws: SecurityException - if there is a security manager present and itdenies access to the specified file.