Added HandOfCard class to

src/main/java/edu/ntnu/stud/cardgame/DeckOfCards.java

 package edu.ntnu.stud.cardgame;
 
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Random;
 import java.util.List;
 
 public class DeckOfCards {
-  private final char[] suit = { 'S', 'H', 'D', 'C' };
+  private final char[] suit = {'S', 'H', 'D', 'C'};
   private final List<PlayingCard> deck;
   Random random = new Random();
 
-  public DeckOfCards(){
+  public DeckOfCards() {
     deck = new ArrayList<>();
 
     for (int i = 0; i < 52; i++) {
-      int face = random.nextInt(13)+1;
-      int suitNum = random.nextInt(4);
-      deck.add(new PlayingCard(suit[suitNum], face));
+      char s = suit[i / 13];
+      int f = (i % 13) + 1;
+      deck.add(new PlayingCard(s, f));
     }
   }
 
@@ -23,13 +24,29 @@ public class DeckOfCards {
     return deck;
   }
 
-  @Override
-  public String toString() {
-    StringBuilder sb = new StringBuilder();
-    for (PlayingCard card : deck) {
-      sb.append(card.getAsString());
-      sb.append("\n");
+  public HandOfCards dealHand(int n) {
+    if (n < 0 || n > deck.size()) {
+      throw new IllegalArgumentException("Invalid number of cards to deal");
+    }
+    HandOfCards hand = new HandOfCards();
+    for (int i = 0; i < n; i++) {
+      int cardIndex = random.nextInt(deck.size());
+      if (hand.getHand().contains(deck.get(cardIndex))) {
+        i--;
+      } else {
+        hand.addCard(deck.get(cardIndex));
+      }
+    }
+    return hand;
+    }
+
+    @Override
+    public String toString () {
+      StringBuilder sb = new StringBuilder();
+      for (PlayingCard card : deck) {
+        sb.append(card.getAsString());
+        sb.append("\n");
+      }
+      return sb.toString();
     }
-    return sb.toString();
   }
-}