Problem when splitting an item from array list into a string array

Question

Hello I have an array list that consists of numbers but are strings.

Like this: ["1.1",1.2]. The problem is that I am running into that I am using a for function to split an item of the array list into a string array.

For example if I have array list: ["1.1","1.2"] I would

String[] string_array= array_list.get(0).split("\\.");

That should be working fine, but the problem that I am facing is that it would create a weird string array like [Ljava.lang.String;@ccac396 .

I am not really sure what causes this problem as I used split and array string before and none of this happened.

Note: I am splitting on . ,but since . is a regex I have to use \\. which should split on ..

Here is the part of the code that is causing the problem:

for (int i = 0; i < array_list.size(); i++) {
        String[] splitted_on_for_for_reverse;
        splitted_on_for_for_reverse = array_list.get(i).split("\\.");
        array_list.remove(i);
        String string_to_add = splitted_on_for_for_reverse[1].concat(".").concat(splitted_on_for_for_reverse[0]);
        array_list.add(string_to_add);
    }

I know the problem is not happening from the array list as I have tested it with logs and its fine. the problem is with the string array but I dont know what to do. Any help is appreciated and thanks in advance

[Ljava.lang.String;@ccac396 I think you are logging the srray. That is not the way to see it's content. Check it in debugger — Vladyslav Matviienko
– Vladyslav Matviienko, Commented Jul 30, 2019 at 8:16
String[] string_array= array_list.get(0).split("\."); this does not return a "weird" string array. Maybe you are trying to print it in a weird way. — Stultuske
– Stultuske, Commented Jul 30, 2019 at 8:16
String.split method return an array. of the split items. Also do not remove the items while you iterate them. — Σωτήρης Ραφαήλ
– Σωτήρης Ραφαήλ, Commented Jul 30, 2019 at 8:17
Ok thanks guys it turns it I was logging the array string instead of logging each time of the array separate. Silly Mistake. Thanks everyone — Abdulrahman Abdelkader
– Abdulrahman Abdelkader, Commented Jul 30, 2019 at 8:27
hey guys can you post your comment as an answer so I can mark it as an answer — Abdulrahman Abdelkader
– Abdulrahman Abdelkader, Commented Aug 3, 2019 at 7:32

UniqueHorn · Accepted Answer · 2019-08-15 14:24:58Z

1

[Ljava.lang.String;@ccac396 is not a the string itself, but its location or the location of the string array, respectively. I think you are you printing the whole String[] array, which results in the weird output. Java uses its default toString() method, which often just returns the objects position/reference.

Try to iterate over this array and print each String separately.

answered Aug 15, 2019 at 14:24

UniqueHorn

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Abdulrahman Abdelkader Over a year ago

Thank you for your answer and in fact this is what I were doing. I accepted your answer. Thanks again :)

Abdulrahman Abdelkader · Accepted Answer · 2019-08-16 02:08:47Z

1

To print a string array you must use

Arrays.toString(string_array);

answered Aug 16, 2019 at 2:08

Abdulrahman Abdelkader

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