Hi, I am facing some errors in my codes anyone can see where does the problem come from? Thanks.... The exception is Exception in thread "main" java.lang.NumberFormatException: For input string: "" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48) at java.lang.Integer.parseInt(Integer.java:468) at java.lang.Integer.parseInt(Integer.java:497) try{ FileReader frStream = new FileReader(fileName); BufferedReader brStream = new BufferedReader(frStream); int currentLine=1; while((line = brStream.readLine())!=null){ switch(currentLine) { case 1: pos = line.indexOf("=")+1; accId ...