Cannot add a class field to ArrayList

Question

I have no idea how to properly write line of code adding class field to an ArrayList

public class Main {
    public static void main(String[] args) throws IOException
    {
        zapisz("BazaDanych.txt");
        Scanner scanner = new Scanner(System.in);
        FilmExtended filmExtended = new FilmExtended();
        ArrayList<FilmExtended> bazaFilmow = new ArrayList<>();
        int i = 0;
        while(scanner.nextInt()!= 0)
        {
            boolean check = true;
            do
            {
                System.out.println("Podaj tytuł fimu: ");
                String temp = scanner.nextLine();
                if (temp.matches("[a-zA-Z]{2,}"));
                {
                    bazaFilmow.add(i,filmExtended.setTytul(temp));
                    check = false;
                }
            }while (check);
        }
    }

you always add in index 0 increment your i and does filmExtended.setTytul(temp) return FilmExtended? — Akash Shah
– Akash Shah, Commented Jun 5, 2019 at 9:04
Related Scanner is skipping nextLine() after using next() or nextFoo()? — Pshemo
– Pshemo, Commented Jun 5, 2019 at 9:08

user8007559 · Accepted Answer · 2019-06-05 09:07:16Z

2

You don't increment your index i. It's always 0. You have to put i++; in your do while loop

answered Jun 5, 2019 at 9:07

user8007559

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1 Comment

Mikołaj K Over a year ago

i did but it wasn't written in this part of code i pasted

Vitaly · Accepted Answer · 2019-06-05 10:36:39Z

1

public class Main {
public static void main(String[] args) throws IOException
{
    zapisz("BazaDanych.txt");
    Scanner scanner = new Scanner(System.in);
    List<FilmExtended> bazaFilmow = new ArrayList<>();
    //remove index
    while(scanner.nextInt() != 0)
    {
        boolean check = true;
        do
        {
            System.out.println("Podaj tytuł fimu: ");
            String temp = scanner.nextLine();
            if (temp.matches("[a-zA-Z]{2,}"));
            {
                FilmExtended filmExtended = new FilmExtended(); //create new instance
                filmExtended.setTytul(temp);
                bazaFilmow.add(filmExtended); //use add without index or else need to increment your index
                check = false;
            }
        } while (check);

} }

edited Jun 5, 2019 at 10:36

answered Jun 5, 2019 at 9:07

Vitaly

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1 Comment

Zabuzard Over a year ago

Could you explain what you changed? And why this solves the issue? Else your answer isnt that helpful, see How to Answer thanks.

Marce · Accepted Answer · 2019-06-05 09:05:43Z

1

You have to add i++; in the do while loop

answered Jun 5, 2019 at 9:05

Marce

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Comments

GirishB · Accepted Answer · 2019-06-05 09:11:33Z

0

Two ways to fix it:

filmExtended.setTytul(temp) should return this.
i++ or remove i

answered Jun 5, 2019 at 9:11

GirishB

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