count characters, words and lines in file

count characters, words and lines in file

This should count number of lines, words and characters into file.
But it doesn't work. From output it shows only 0.
Code:
public static void main(String[] args) throws IOException {
int ch;
boolean prev = true;
//counters
int charsCount = 0;
int wordsCount = 0;
int linesCount = 0;
Scanner in = null;
File selectedFile = null;
JFileChooser chooser = new JFileChooser();
// choose file
if (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
selectedFile = chooser.getSelectedFile();
in = new Scanner(selectedFile);
}
// count the characters of the file till the end
while(in.hasNext()) {
ch = in.next().charAt(0);
if (ch != ' ') ++charsCount;
if (!prev && ch == ' ') ++wordsCount;
// don't count if previous char is space
if (ch == ' ')
prev = true;
else
prev = false;
if (ch == '\n') ++linesCount;
}
//display the count of characters, words, and lines
charsCount -= linesCount * 2;
wordsCount += linesCount;
System.out.println("# of chars: " + charsCount);
System.out.println("# of words: " + wordsCount);
System.out.println("# of lines: " + linesCount);
in.close();
}
I can't understand what's going on. Any suggestions?