获取ArrayIndexOutOfBoundsException：2当我使用不同的分隔符分割字符串时

Question

I'm getting an ArrayIndexOutOfBoundsException: 2 and have no idea how to fix it. It happened when I change my delimiter from (",") to ("^[A-Za-z]+). Here is the method I'm having the problem in:

public void populateArrayList() throws FileNotFoundException{
    File inputFile = new File("StirlingHistoric.csv");
    Scanner scan = new Scanner(inputFile);

    while(scan.hasNext()){
        String line = scan.next();
        String [] input = line.split("^[A-Za-z]+"); // try get the useDelimiter method to work instead
        addEntry(input[0], input[1], input[2], input[3], input[4], input[5]);      
    }
    scan.close(); 
}

The program crashes at the call to addEntry. The thing is if I use the:

String [] input = line.split(","); as delimiter it works fine but there is still other symbols in the .csv file I have to get rid of, mostly just quotation marks, so it made sense to use the ("^[A-Za-z]+") delimiter.

I have uploaded two images of my debugger that gives some information of whats happening in the array. I have highlighted (in the images) some lines of code in green and blue to draw attention to them. And have also made some comments on the images. Here is the links:

Pic 1: http://tinypic.com/r/25hdbgx/8

Pic 2: http://tinypic.com/r/35lb3nt/8

Just click on the image to enlarge it. If you would like me to post the entire class this method belongs to just let me know. Thanks

Answer 1

Put the ^ inside the [] to match a chararcter except.

"[^A-Za-z]+"

A ^ outside matches the beginning of the input.

Also, test the size of the resulting array:

if(input.length < 5 ) /* do something */;

Answer 2

edit:

How do you know when the code hits addEntry if there even is a input[5] ? Or is that a constant factor in the file? You know for sure that when you split the input string there will only be arrays of 6 elements and not smaller? Because if thats the case then it explains the arrayindexoutofbounds exception on that line.

A solution to that would be to pass the input array as a parameter in the addEntry method and deal with different lengths there.