transport io InputStream io OutputStream io io RandomAccessFile io FileInputStream io FileOutputStream tstandardfile tseekablefile path_ randomaccessfile inputfile_ tstandardfile path path_ path inputfile_ randomaccessfile path_ inputstream getinputstream fileinputstream inputfile_.getfd outputstream getoutputstream fileoutputstream path_ close inputfile_ inputfile_.close length inputfile_.length seek pos inputfile_.seek pos