java - Why is my program catching / throwing a FileNotFoundException when the file exists? -

java newbie here!

i'm writing program practice reading input , writing output files. i've finished coding program, when run it, program catches , proceeds filenotfoundexception.

the file in source folder program, , i've tried placing in every folder related program. i've tried:

• declaring exceptions in method header
• surrounding section-in-question try/catch block.
• both of above together.

here's relevant code causing problems. there sticks out i'm missing?

public static void main(string[] args) throws filenotfoundexception  {      scanner keyboard = new scanner(system.in);      string playerhighestscore = "", playerlowestscore = "";     int numplayers = 0, scorehighest = 0, scorelowest = 0;      system.out.println("enter input file name: ");                            string inputfilename = keyboard.nextline();                       string outputfilename = getoutputfilename(keyboard, inputfilename);          file inputfile = new file(inputfilename);     try {         scanner reader = new scanner(inputfile);         reader.close();     }     catch (filenotfoundexception exception) {                system.out.println("there problem reading file.");                            system.exit(0);     }      scanner reader = new scanner(inputfile);     printwriter writer = new printwriter(outputfilename); 

the answer simple. if filenotfoundexception, reason file not found in given path.
if use ide, path working directory different source directory.
example, if using netbeans, source files inside /src. working directory (.) project directory.
in other hand, problem may thing @don mentioned. if going cross platform approach, can use "/" in paths. works irrespective os.
example : string filename = "c:/directory/file.txt";
, these paths case sensitive. make sure use correct case. (it won't problem in windows, until package program.)