How to use String replace methods without replacing with empty Strings?

Question

I am loading a String from a csv file and trying to make an int array with it. The problem is I keep running into a NumberFormatException which is thrown when the program finds a "" in the String array.

I don't need those empty Strings, I just want ints.

Is there a way to avoid replacing characters with empty Strings?

     aLine = aLine.replaceAll(" ", "").replaceFirst(",", "");
     aLine = aLine.replace(name, "").replaceAll("\"", "");

     final String[] strScores = aLine.split(",");

     final int[] scores = Arrays.stream(strScores)
                                 .mapToInt(Integer::parseInt).toArray();

Elliott Frisch · Accepted Answer · 2019-08-04 01:22:01Z

2

You could filter the stream for not empty and not null before you parse. Like,

final int[] scores = Arrays.stream(strScores)
        .filter(x -> x != null && !x.isEmpty())
        .mapToInt(Integer::parseInt)
        .toArray();

answered Aug 4, 2019 at 1:22

Elliott Frisch

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1 Comment

LuminousNutria Over a year ago

Thanks, I didn't know you could do that.

Bhargav Rao · Accepted Answer · 2019-08-04 02:08:11Z

0

You should use an array list because you can easily add and remove

array_list<String> list = new ArrayList<String>(); // create array list

for (int i =0; i < array_string.length;i++){
    if (!string_array[i].equals("")){ // filter out empty
        array_list.add(string_array[i]);
    }
}

String new_string_array_without_empty = array_list.toArray(new String[0]); // convert to string array again

edited Aug 4, 2019 at 2:08

Bhargav Rao

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answered Aug 4, 2019 at 1:34

Abdulrahman Abdelkader

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2 Comments

LuminousNutria Over a year ago

Thanks, but I would rather not add any data structures I don't need.

Abdulrahman Abdelkader Over a year ago

You are right. I am new to android development but decided to try to help anyways. Thanks for replying. :)

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