counting the number of lines in a text file (java)

Below is how i count the number of lines in a text file. Just wondering is there any other methods of doing this?

while(inputFile.hasNext()) {    
    a++;
    inputFile.nextLine();
}
inputFile.close();

I'm trying to input data into an array, i don't want to read the text file twice.

any help/suggestions is appreciated.

thanks

If you just want to add the data to an array, then I append the new values to an array. If the amount of data you are reading isn't large and you don't need to do it often that should be fine. I use something like this, as given in this answer: Reading a plain text file in Java

BufferedReader fileReader = new BufferedReader(new FileReader("path/to/file.txt"));
try {
    StringBuilder sb = new StringBuilder();
    String line = br.readLine();

    while (line != null) {
        sb.append(line);
        sb.append(System.lineSeparator());
        line = br.readLine();
    }
    String everything = sb.toString();
} finally {
    br.close();
}

If you are reading in numbers, the strings can be converted to numbers, say for integers intValue = Integer.parseInt(text)