Help with "ArrayIndexOutOfBoundsException" on code using Vector class and methods

[al666940]

Hello everyone,

I'm coding card functions (shuffle, draw, etc) using the Vector class and functions, and I'm almost finished except for an exception that I can't seem to get rid of.

Can anyone help me please? It's 2 lines of code which are causing the exception, and the problem is that I do not understand why it is throwing the exception, it should work.

Either it's them or my FOR function containing them is somehow flawed.

Lines are highlighted below: the last two add methods from Vector class.

//2.- reassemble pool and remaining deck on result deck , taking one turn each to effectively shuffle
deckSize = (deckV.size()*2) - 1;
System.out.println("Size of original deck is " + deckSize);
System.out.println("Size of deckV is " + deckV.size());
System.out.println("Size of deck2V is " + deck2V.size());
System.out.println("First element on deckV is " + deckV.get(0));
System.out.println("First element on deck2V is " + deck2V.get(0));
for (int i = 0; i < deckSize; i++) {

// EXCEPTION IS HERE!!!!!!!! ANY OF THESE TWO THROWS IT

deck3V.add(deckV.remove(0));
deck3V.add(deck2V.remove(0));
}

// print resulting reshuffled deck
System.out.println(" ");
System.out.println("Here begins reshuffled deck");
System.out.println("Size of resulting deck is " + poolV.size());
for (int i = 0; i < poolV.size(); i++) {
System.out.println(poolV.get(i));
}


}

}


Exception is (from printout):

Size of original deck is 51
Size of deckV is 26
Size of deck2V is 26
First element on deckV is 8 of Hearts
First element on deck2V is 2 of Clubs
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 0
at java.util.Vector.remove(Unknown Source)
at can.McAfee.example1.Deck2.main(Deck2.java:137)

[jkmyoung]

Do you have any guarantees as to the size of each of the 2 original decks?
DeckV and Deck2V

You'll definitely get an out of bounds error because the original first deck had size:
deckSize = deckV.size(), not
deckSize = (deckV.size()*2) - 1