Help to add a function in the below Java method so the display of $4$ cards stays on top over the cards from the throwaway pile when one of the four cards is dragged and placed over a card from the throwaway pile in the panel and also when a throwaway card dragged back it will stay on top as the top card. class DrawingPanel extends JPanel implements MouseListener, MouseMotionListener $\{$

private final ArrayList deck;

private final ArrayList throwawayPile;

private Card selectedCard;

private Point lastMousePosition;

public DrawingPanel$()\{$

deck $=$ new ArrayList$<>()$;

throwawayPile $=$ new ArrayList$<>()$;

initializeDeck$()$;

addMouseListener$($this$)$;

addMouseMotionListener$($this$)$;

$\}$

private void initializeDeck$()\{$

deck.clear$()$;

String$[]$ suits $=\{"$Hj$","$Ru$","$Kl$","$Sp$"\}$;

String$[]$ ranks $=\{"$Ess$","2","3","4","5","6","7","8","9","10","$Kn$","$Q$","$K$"\}$;

int xOffset $=50$;

int yOffset $=50$;

int cardWidth $=50$;

int cardHeight $=70$;

for $($String suit : suits$)\{$

for $($String rank : ranks$)\{$

deck.add$($new Card$($xOffset$,$ yOffset, cardWidth, cardHeight, Color.BLUE, rank, suit$))$;

$\}$

$\}$

shuffleDeck$()$;

$\}$

@Override

protected void paintComponent$($Graphics g$)\{$

super.paintComponent$($g$)$;

for $($Card card : deck$)\{$

if $(!$card.equals$($selectedCard$))\{$

card.draw$($g$)$;

$\}$

$\}$

for $($Card card : throwawayPile$)\{$

if $(!$card.equals$($selectedCard$))\{$

card.draw$($g$)$;

$\}$

$\}$

if $($selectedCard $!=$ null$)\{$

selectedCard.draw$($g$)$;

$\}$

$\}$

public void clear$()\{$

if $($deck$.$size$()>=52)\{$

deck.subList$(0,52).$clear$()$;

repaint$()$;

$\}$

$\}$

public void displayFourCards$()\{$

clear$()$;

initializeDeck$()$;

CardUtil.displayFourCards$($deck$)$;

int componentCount $=$ this.getComponentCount$()$;

for $($int i $=0$; i $<4$; i$++)\{$

if $(($componentCount $-$ i $-1)>=0)\{$

this.setComponentZOrder$($this$.$getComponent$($componentCount $-$ i $-1),$ i$)$;

$\}$

$\}$

throwawayPile.clear$()$;

repaint$()$;

$\}$

@Override

public void mouseClicked$($MouseEvent e$)\{$

Point mousePoint $=$ e$.$getPoint$()$;

if $($selectedCard $==$ null $||!$selectedCard.contains$($mousePoint$))\{$

for $($int i $=$ deck.size$()-1$; i $>=4$; i$--)\{//$ Corrected the lower bound of the loop to include all cards.

if $($deck$.$get$($i$).$contains$($mousePoint$))\{$

Card clickedCard $=$ deck.get$($i$)$;

if $(!$clickedCard.equals$($selectedCard$))\{$

selectedCard $=$ clickedCard; $//$ Update the selected card.

clickedCard.toggleDenomination$()$;

moveCardToThrowawayPile$($clickedCard$)$;

deck.add$($clickedCard$)$;

repaint$()$; $//$ Repaint to show changes.

break; $//$ Correct use of return after handling the card click.

$\}$

$\}$

$\}$

$\}$

$\}$

private void moveCardToThrowawayPile$($Card card$)\{$

if $(!$throwawayPile.contains$($card$))\{$

card.move$($getWidth$()-$ card.width $-105,8)$;

throwawayPile.add$($card$)$;

$\}$

$\}$

@Override

public void mousePressed$($MouseEvent e$)\{$

Point mousePoint $=$ e$.$getPoint$()$;

selectedCard $=$ null;

boolean cardSelected $=$ false;

for $($int i $=0$; i $<$ Math.min$($deck$.$size$(),4)$; i$++)\{$

if $($deck$.$get$($i$).$contains$($mousePoint$))\{$

selectedCard $=$ deck.get$($i$)$;

lastMousePosition $=$ mousePoint;

cardSelected $=$ true;

break;

$\}$

$\}$

if $(!$cardSelected$)\{$

for $($int i $=4$; i $<$ deck.size$()$; i$++)\{$

if $($deck$.$get$($i$).$contains$($mousePoint$))\{$

selectedCard $=$ deck.get$($i$)$;

lastMousePosition $=$ mousePoint;

cardSelected $=$ true;

break; $//$ Found the card, no need to continue checking.

$\}$

$\}$

$\}$

if $(!$cardSelected && $!$throwawayPile.isEmpty$())\{$

for $($int i $=$ throwawayPile.size$()-1$; i $>=0$; i$--)\{$

if $($throwawayPile$.$get$($i$).$contains$($mousePoint$))\{$

$//$ If any card in the throwaway pile is clicked, select that specific card.

selectedCard $=$ throwawayPile.get$($i$)$;

lastMousePosition $=$ mousePoint;

break;

$\}$

$\}$

$\}$

repaint$()$;

$\}$

@Override

public void mouseReleased$($MouseEvent e$)\{$

if $($selectedCard $!=$ null$)\{$

selectedCard $=$ null;

$\}$