ok, this is a basic questionfilename="/home/user/account.sav"; BufferedWriter writer=new BufferedWriter(new FileWriter(filename)); writer.write("whatever you want to write to the line"); writer.newLine(); //finally after u finish writer.close(); use your own file name... windows file name like "C:/myfolder/saveing.sav"; or relative file locations... and remember the call function must "throws IOException"