I'm not sure why there's runtime errors in my code

Object temp = thePile.elementAt(i);
thePile.setElementAt(thePile.elementAt(j), i);
thePile.setElementAt(temp, j);
public Solitaire() {
window = new SolitaireFrame();
initialize();
window.show();
}

public void addCard(Card aCard) {
thePile.push(aCard);
}
private Stack thePile;

public class Main {

public static void main(String[] args) {
new Solitaire();
}
}

Answer: Object temp = thePile.element At(i); th Pile.setElementAt(thePile.elementAt(j), i); thePile.setElementAt(temp, j); public Solitaire() { window = new SolitaireFrame(); initialize(); window.show(); } public void addCard(Card aCard) { thePile.push(aCard); } private Stack thePile; public class Main { public static void main(String[] args) { new Solitaire(); } }

Explanation:

Based on the code given , it appears that there are no syntax errors. However, there are a few issues that might cause runtime errors:

The code creates an instance of a class called "Solitaire" and calls its constructor, which in turn initializes the window and calls the "initialize()" method. It then calls the "addCard()" method to add a card to a stack called "thePile".

Therefore,  It also contains a swap method which is used to swap elements in a stack. The error message "runtime errors in the code" is not specific enough to determine the cause of the problem.

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