Question

public void thisisnotworking()
{
    Scanner input=new Scanner(System.in);
    String cardA;
    String cardB;
    System.out.print("Enter Card: "); cardA=input.nextLine();
    System.out.print("Enter Card "); cardB=input.nextLine();
   Card a = game.get(game.indexOf(cardA));
   Card b = game.get(game.indexOf(cardB));

This code is part of a method i’ve written. Basically the user inputs the card that is one of the cards in an array list and then another card. Currently I’m getting an IndexOutOfBoundsException error when I’m running this part of the code.

Can anyone tell me what is wrong with it?

Answer 1

It’s hard to say without seeing game, but seems like cardA and cardB are not in game, so game.indexOf(cardA) returns -1 and game.get(-1) throws the exception.

Also, looking at your code, you search for String in game, and then takes an element from game, which is a String and assigns it to a Card object. You cannot cast from String to any other class than Object, since String is a final class.