java - Why is my text file always empty? -

i have created game saves high score in text file called highscores.txt. when open game, correct high score displayed. when open text file, empty. why this? here code writing , reading text file.

fileinputstream fin = new fileinputstream("highscores.txt"); datainputstream din = new datainputstream(fin);  highscore = din.readint(); highsscore.settext("high score: " + highscore); din.close();  fileoutputstream fos = new fileoutputstream("highscores.txt"); dataoutputstream dos = new dataoutputstream(fos);  dos.writeint(highscore); dos.close(); 

dataoutputstream.writeint not write integer text; writes "raw" or "binary" integer consisting of 4 bytes. if try interpret them text (such viewing them in text editor), garbage, because they're not text.

for example, if score 100, writeint write 0 byte, 0 byte, 0 byte, , 100 byte (in order). 0 invalid character (when interpreted text) , 100 happens letter "d".

if want write text file, use scanner parsing (reading) , printwriter writing - this:

// reading filereader fin = new filereader("highscores.txt"); scanner sc = new scanner(fin);  highscore = din.nextint(); highscore.settext("high score: " + highscore); sc.close();  // writing filewriter fos = new filewriter("highscores.txt"); printwriter pw = new printwriter(fos); pw.println(highscore); pw.close(); 

(of course, there many other ways this)