java - Reading with InputStream while using Scanner -

i want read client's inputstream in 2 different ways:

1: use scanner on inputstream read strings.

2: use inputstream object read file buffer.

at first, want read text, gives me name , size of file, in case: "file:name:...", "file:size:...".

when have information, inputstream should read file. problem is, try read file in "scanner.hasnextline()"-loop inputstream object causes inputstream.read() method return -1 or eos. have brought problem minimal size have answer me question:

why read-method return -1 here:

if (scanner.hasnextline()) {             system.out.println(inputstream.read()); } 

as oracle documentation scanner.hasnextline() states, method does not advance scanner. means perpetually looking @ first line of file scanner, while advancing inputstream. means though scanner has next line, inputstream may not. appear walking off end of file inputstream.

if not advance scanner along input stream, cannot know scanner looking @ same location in file. dubious @ best read 1 file simultaneously scanner , inputstream anyway.

consider refactoring code use 1 or other.

if read entire contents of file single string, consider this:

static string readfile(string path, charset encoding)    throws ioexception  {   byte[] encoded = files.readallbytes(paths.get(path));   return new string(encoded, encoding); } 

and other methods how create java string contents of file?