I'm new to java.. Please help ^^

[wii]

I got this program from a friend and I would like to know if it could be modified or it could be change in any other way. I just study java for 3 months so I don't really know many methods like others. Thank you =)


import java.util.Scanner;
import java.io.*;

public class CountVowel2 {

public static void main(String[]args) {

File txtFile;
FileReader in;
BufferedReader readFile;
String fileName;
String txt, letter;
int vowelsum = 0;
Scanner input = new Scanner(System.in);

System.out.print("Enter the file name: ");
fileName = input.nextLine();


try {
txtFile = new File(fileName);
in = new FileReader(txtFile);
readFile = new BufferedReader(in);
while ((txt = readFile.readLine()) != null) {
txt = txt.toLowerCase();
for (int i = 1; i <= txt.length(); i++) {
letter = txt.substring(i-1, i);
if (letter.matches("[aeiou]")) {
vowelsum +=1;
}
}
}
System.out.println("The number of vowels in " + fileName + " is " + vowelsum + ".");
readFile.close();
in.close();
} catch (FileNotFoundException e) {
System.out.println("File does not exist or could not be found.");
System.err.println("FileNotFoundException: " + e.getMessage());
} catch (IOException e) {
System.out.println("Problem reading file.");
System.err.println("IOException: " + e.getMessage());
}
}
}

[nspils]

In what manner do you want to modify or change it?