CSVWriter will not take ArrayList Convert to Array

Question

I would like to export a multidimensional array to a CSV file. I'm able to get a set array to export, but am struggling with a growing array

Here is what I have so far:

String[][] data = new String[][] {
    new String[]{"quick","brown","fox"},
    new String[]{"apple","banana","cherry"},
    new String[]{"quick","brown","fox"}
};

for(int i=0; i<data.length; i++) {
        //first line prints "quick", "brown", "fox" etc
            writer.writeNext(data[i]);
        }

Now growing from my code, I need to be able to add arrays to "data".

For instance, if I have:

String[] abc = new String[] {"a","b","c"};
String[] def = new String[] {"d","e","f"};
...

and I don't know how many of these string arrays I'll have, researching tells me that I'll need to add these to a ArrayList. So I came up with something like this:

        List<String[]> stockList = new ArrayList<String[]>();
        stockList.add(abc);
        stockList.add(def);
        // could potentially add more

        String[] stockArr = new String[stockList.size()];
        stockArr = stockList.toArray(stockArr);

        for(int i=0; i<data.length; i++) {
            writer.writeNext(stockArr[i]);
            Log.i("loop", "here: " + data[i]);
        }

except writeNext cannot be applied to a java string.

Overall, it seems like I need to have an ArrayList of a string arrays. Then at the end, convert that ArrayList into an Array and not lose the string arrays?

Would appreciate any help, thanks!

boxed__l · Accepted Answer · 2017-03-01 17:25:53Z

1

Have you tried this:

for(String[] arr:stockList) {
    writer.writeNext(arr);
    Log.i("loop", "here: " + arr);
}

Better still :

writer.writeAll(stockList);

answered Mar 1, 2017 at 17:25

boxed__l

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