Fix filpath in PlayingCard and implement code in DeckOfCards

src/main/java/no/ntnu/idatt2002/a4/cardgame/model/DeckOfCards.java

 package no.ntnu.idatt2002.a4.cardgame.model;
 
-import java.util.HashMap;
+import java.util.*;
 
 public class DeckOfCards {
   private HashMap<Integer, PlayingCard> deck;
+  private final char[] suits = {'H', 'D', 'S', 'C'};
+
+  public DeckOfCards() {
+    deck = new HashMap<>();
+    int iteration = 0;
+    for (char suit : suits) {
+      for (int i = 1; i < 14; i++) {
+        iteration++;
+        deck.put(iteration, new PlayingCard(suit, i));
+      }
+    }
+  }
+  public HashMap<Integer, PlayingCard> getDeck() {
+    return deck;
+  }
+  public List<PlayingCard> dealHand(int numberOfCards) {
+    Random random = new Random();
+    List<PlayingCard> hand = new ArrayList<>(numberOfCards);
+    HashSet<Integer> dealtKeys = new HashSet<>();
+    for (int i = 0; i < numberOfCards; i++) {
+      int randomKey = random.nextInt( this.deck.size());
+      while (dealtKeys.contains(randomKey)) {
+        randomKey = random.nextInt(this.deck.size());
+      }
+      hand.add(deck.get(randomKey));
+      dealtKeys.add(randomKey);
+    }
+    return hand;
+  }
 }