在Java中读取CSV文件时为空行

Question

I've been working on this app in Android for a while now and suddenly encountered the following issue even though it has not been a problem many times before.

I am reading a CSV file in Java, but when I print a log of each line of that CSV file, there appears to be a blank line even though there is not one in the actual CSV file.

This is how I'm reading the file:

InputStreamReader inputStreamReader;
try {
    inputStreamReader = new InputStreamReader(getActivity().getAssets().open("My_file.csv"));
    Scanner inputStream = new Scanner(inputStreamReader);
    inputStream.nextLine(); // Ignores the first line
    while (inputStream.hasNext()) {
        String data = inputStream.nextLine(); // Gets a whole line
        String[] line = data.split(","); // Splits the line up into a string array

        array.add(line[1]);
    }
    inputStream.close();
} catch (IOException e) {
    e.printStackTrace();
}

When I run it, I get an ArrayIndexOutOfBoundsException and after putting in a log message before array.add(line[1]) which printed the line, I found that there was a blank line in my CSV file (and there wasn't when I checked it).

Any ideas?

Answer 1

First of All:

array.add(line[1]) is going to throw an ArrayIndexOutOfBoundsException every time you have a line without a , ... Might be a good idea to check for that before trying to read it. ie if(line.length > 1) { array.add(line[1]);}

Just doing this will fix multiple errors for you.