Added some checks for error handling and typesafety

Personal/Cards/src/Sevens.java

@@ -4,6 +4,7 @@ import java.util.Scanner;
 public class Sevens extends Deck {
 
     public Sevens() {
+        super();
     }
 
     public void play(List<Player> allPlayers, int numOfPlayers) {
@@ -15,7 +16,7 @@ public class Sevens extends Deck {
         while (!winner) {
             Player player = allPlayers.get(playerCounter);
 
-            tableHand.display();
+            tableHand.display("Current Deck:");
             System.out.println("\nPlayer " + (playerCounter + 1) + "'s Deck:\n");
             player.displayHand();
 
@@ -29,26 +30,55 @@ public class Sevens extends Deck {
             playerCounter = (playerCounter + 1) % numOfPlayers;
         }
 
-        Player winningPlayer = allPlayers.get(playerCounter);
-        System.out.println("Player " + (playerCounter + 1) + " Is The Winner!");
-        System.out.println("Winning Deck: ");
-        winningPlayer.displayHand();
+        System.out.println("\nPlayer " + (playerCounter) + " Is The Winner!");
+        tableHand.display("Winning Deck:");
     }
 
     public String[] askPlayer(int playerCounter, Player player, TableHand tableHand, Scanner in) {
         System.out.println("\nEnter In The Card That You Want To Play: \nPress S To Skip");
         String userCard = in.nextLine();
         if (userCard.toLowerCase().charAt(0) == 's') {
+            System.out.println("Player has skipped their turn!");
             return new String[0];
         }
 
         String[] splitCard = userCard.split(" ");
-        if (splitCard.length != 2)
-            return new String[0];
+        if (splitCard.length == 2)
+            validatePlayerInput(splitCard, player, tableHand, in);
+
         return splitCard;
 
     }
 
+    public void validatePlayerInput(String[] splitCard, Player player, TableHand tableHand, Scanner in) {
+
+        // Check if the first element is of type integer
+        try {
+            Integer.parseInt(splitCard[0]);
+        } catch (NumberFormatException e) {
+            System.out.println("Card Face Value Not Valid! Please Enter A Suitable Face");
+            while (!in.hasNextInt()) {
+                in.nextLine();
+                System.out.println("Card Face Value Not Valid! Please Enter A Suitable Face");
+            }
+            splitCard[0] = Integer.toString(in.nextInt());
+        }
+
+        boolean validSuit = false;
+        while (!validSuit) {
+            for (Suits suits : Suits.values()) {
+                if (suits.getSuit().equalsIgnoreCase(splitCard[1])) {
+                    validSuit = true;
+                    break;
+                }
+            }
+            if (validSuit == false) {
+                System.out.println("Card Suit Not Valid! Please Enter A Suitable Suit");
+                splitCard[1] = in.nextLine();
+            }
+        }
+    }
+
     public void validateCard(String[] splitCard, Player player, TableHand tableHand) {
 
         int userCardFace = Integer.parseInt(splitCard[0]);
@@ -58,22 +88,21 @@ public class Sevens extends Deck {
         Hand userHand = player.getHand();
         Card cardToBePlayed = userHand.sevensCheckCardExists(userCardFace, userCardSuit);
         if (cardToBePlayed == null) {
-            System.out.println("Your Card Doesn't Exist Within Your Hand! Try again!");
+            System.out.println("Your Card Doesn't Exist Within Your Hand! Turn Skipped!");
             return;
         }
 
         Hand userSuitHand = tableHand.getSevensTableHand().get(userSuitInTableHand);
-        canBePlayed(cardToBePlayed, userSuitHand, userSuitInTableHand, tableHand, player);
+        canBePlayed(cardToBePlayed, userSuitHand, player);
     }
 
-    public void canBePlayed(Card cardToBePlayed, Hand userSuitHand, Suits userSuitInTableHand, TableHand tableHand,
-            Player player) {
+    public void canBePlayed(Card cardToBePlayed, Hand userSuitHand, Player player) {
 
         if (userSuitHand.getListOfCards().size() == 0) {
             if (cardToBePlayed.getFace() == 7) {
-                playACard(userSuitHand, cardToBePlayed, 0, tableHand, userSuitInTableHand, player);
+                playACard(userSuitHand, cardToBePlayed, 0, player);
             } else {
-                System.out.println("Card Played Was Not A Face of 7 in Empty Suit! Try again!");
+                System.out.println("Card Played Was Not A Face of 7 in Empty Suit! Turn Skipped!");
                 return;
             }
         } else {
@@ -82,19 +111,19 @@ public class Sevens extends Deck {
             int maximumValueInUserSuitHand = userSuitHand.getListOfCards().get(sizeOfUserSuitHand - 1).getFace();
 
             if (cardToBePlayed.getFace() == (minimumValueInUserSuitHand - 1)) {
-                playACard(userSuitHand, cardToBePlayed, 0, tableHand, userSuitInTableHand, player);
+                playACard(userSuitHand, cardToBePlayed, 0, player);
             } else if (cardToBePlayed.getFace() == (maximumValueInUserSuitHand + 1)) {
-                playACard(userSuitHand, cardToBePlayed, sizeOfUserSuitHand, tableHand, userSuitInTableHand, player);
+                playACard(userSuitHand, cardToBePlayed, sizeOfUserSuitHand, player);
+            } else {
+                System.out.println("Card Plyaed Was Not +1 or +1 Of Any Cards In The Suit! Turn Skipped!");
+                return;
             }
         }
-
     }
 
-    public void playACard(Hand userSuitHand, Card playingCard, int indexToInsertCard, TableHand tableHand,
-            Suits userSuitInTableHand, Player player) {
+    public void playACard(Hand userSuitHand, Card playingCard, int indexToInsertCard, Player player) {
 
         userSuitHand.addCard(indexToInsertCard, playingCard);
-
         player.getHand().removeCard(playingCard);
     }
 }