Question

Hello guys I’am beginner of the Java and i’ve got some problems with array&arraylist. My main problem is how to write computing, dynamic data into the array and later how to read it? Here’s my weird code:

    public static void main(String[] args) {

    int yil, bolum = 0, kalan;
    Scanner klavye = new Scanner(System.in);
    ArrayList liste = new ArrayList();

    //or shall i use this? >> int[] liste = new int[10];

    System.out.println("Yıl Girin: "); // enter the 1453
    yil = klavye.nextInt();

    do{ // process makes 1453 separate then write in the array or arraylist. [1, 4, 5, 3]

    kalan = yil % 10;
    liste.add(kalan); //my problem starts in here. How can i add "kalan" into the "liste".
    bolum = yil / 10;
    yil = bolum;

    }while( bolum == 0 );

    System.out.println("Sayının Basamak Sayısı: " + liste.size()); //in here read the number of elements of the "liste" 
    klavye.close();
}

Edit:

    //needs to be like that
    while( bolum != 0 ); 
    System.out.println("Sayının Basamak Sayısı: " + liste);

Answer 1

I think that you most likely want your loop stopping condition to be:

while( bolum != 0)

because bolum will only be 0 when there are no more digits left in your number to process. Also, as amit mentions above it could be the case that the user entered 0 when prompted for a number, so you should take that into account.