New to Java

Is it possible to read .dat files that are set to hidden? 'cause what i did was i created a .dat file and set its attributes to hidden and my Read file code cannot read hidden files.

here's my Read file code:

Scanner read=new Scanner(FileReader("C:\password.dat"));

and another thing, how do you Write a .dat file that is hidden too? 'cause my password.dat file needs to be updated.

here's my Write file code:

PrintWriter write=new PrintWriter("C:\password.dat");

thank for the help.