Adding list of different length to an array

Question

I am having an array were I add several lists to this array. After that I would like to add other columns to this array which do not have the same length.

int minSize = Math.min(testList.get(j).getDate().size(), testList.get(j).getTotalReturnIndex().size());

List<String[]> data = new ArrayList<String[]>();
for(int m = 0; m < minSize; m++)
{
    //TODO remove .replace('.', ',')
    data.add(new String[] {testList.get(j).getCompanyName(), testList.get(j).getDate().get(m), testList.get(j).getCurrency(), testList.get(j).getTotalReturnIndex().get(m).toString().replace('.', ','), testList.get(j).getPrice().get(m).toString().replace('.', ','), "", sublist.get(m)});
    //here I am getting an `java.lang.IndexOutOfBoundsException:` because the list is not so long like the others
}

This is how I add the first part(the first 5 columns of the picture) to the array.

Visualized in excel my array should look like that in the end:

enter image description here

How to add the other 3 columns to my array beginning with sublist based on the above code?

I really appreciate your answer!

Thorben · Accepted Answer · 2014-01-10 16:06:28Z

1

You could try it with a simple ternary:

int minSize = Math.min(testList.get(j).getDate().size(), testList.get(j).getTotalReturnIndex().size());

List<String[]> data = new ArrayList<String[]>();
for(int m = 0; m < minSize; m++) {
    //TODO remove .replace('.', ',')
    data.add(new String[] {testList.get(j).getCompanyName(),
        testList.get(j).getDate().get(m), 
        testList.get(j).getCurrency(), 
        testList.get(j).getTotalReturnIndex().get(m).toString().replace('.', ','),
        testList.get(j).getPrice().get(m).toString().replace('.', ','),
        "", 
        (m < sublist.size())? sublist.get(m) : "" 
    });
}

edited Jan 10, 2014 at 16:06

answered Jan 10, 2014 at 15:39

Thorben

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2 Comments

user2051347 Over a year ago

Thx for your answer! What is better if I only have one value: new String[]{""} or "" ?

Thorben Over a year ago

it should only be "", because you only can put simple Strings in a String Array. Sorry, I was confused, because there are 3 more columns in your excel sheet. I will edit the code.

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