import java.util.Arrays; import java.util.Scanner; public class Game {     private Player[] players;     private Board board;     private int currentPlayerIndex;     private int numOfPlayers;          private Scanner scanner = new Scanner(System.in);          // constructor     public Game(){         //create a new board;         this.board = new Board();         //setup game;         this.setupGame();         //start game;         this.play();     }          //Game Setup     public void setupGame(){         System.out.println("How many players would you like to  included in this game? (2-4)");         numOfPlayers = scanner.nextInt();                  while (numOfPlayers < 2 || numOfPlayers > 4) {             System.out.println("Invalid input. Please enter a number between 2 and 4.");             numOfPlayers = scanner.nextInt();         }         scanner.nextLine();                  String[] playerNames = new String[numOfPlayers];                  this.players = new Player[numOfPlayers];         for (int i = 0; i < numOfPlayers; i++) {             System.out.println("Enter player " + (i + 1) + " name:");             String newPlayerName = scanner.nextLine();                        //Makes sure players don't have the same name             while (Arrays.asList(playerNames).contains(newPlayerName)) {                 System.out.println("Player names cannot be the same. Please enter a different name.");                 System.out.print("Enter player " + (i + 1) + " name: ");                 newPlayerName = scanner.nextLine();             }             playerNames[i] = newPlayerName;                         // adds player to array              players[i] = new Player(newPlayerName, Integer.toString(i + 1));         }                                    //setup board         this.board.boardSetUp();                  //set starting player to a random index         this.currentPlayerIndex = (int) Math.floor(Math.random() * numOfPlayers);              }          //Print winner     private void printWinner(Player player){         System.out.println("------------------------------------------------");         System.out.println("     | Player " +player.getPlayerNumber()+" which is "+player.getPlayerName() +" wins |     ");         System.out.println("------------------------------------------------");     }          private void playerTurn(Player currentPlayer){                      System.out.println("\n---------Player " + currentPlayer.getPlayerNumber() +" turn -----\n");                                       // so to be within the bounds of the array.             int move = currentPlayer.makeMove() - 1;                          //to check if the move              if(this.board.columnFull(move)) {                 System.out.println("Column is full.");             }                          //To make sure our column numbers are always valid             if(move< 0 || move >= this.board.getColumns()){                 System.out.println("Invalid column number.");             }                          //update board to add token             this.board.addToken(move, currentPlayer.getPlayerNumber());                  }              }          private void play() {            while(!this.board.boardFull()){              Player currentPlayer = players[currentPlayerIndex];                          //print board             this.board.printBoard();                          //to make a move                              this.playerTurn(currentPlayer);                              //catch block                 System.out.println("Something went wrong adding a token to the playerTurn function: " + e);;                                       //if a player wins print the current player             if(this.board.checkIfPlayerIsWinner(currentPlayer.getPlayerNumber())) {                 this.board.printBoard();                 this.printWinner(currentPlayer);                 return; // ends game when a player wins;             }                           //alternate current player             setPlayerIndex();         }                  System.out.println("Board is full!");     }          //to set current player Index     private void setPlayerIndex() {         this.currentPlayerIndex = (this.currentPlayerIndex + 1) % numOfPlayers;     } }   import java.util.Scanner; public class Player {        //initial variables     private String playerName;     private String playerNumber;     private static Scanner scanner = new Scanner(System.in);          //constructor for player     public Player(String playerName, String playerNumber) {         this.playerName = playerName;         this.playerNumber = playerNumber;     }     public String getPlayerName() {         return this.playerName;     }     public String getPlayerNumber() {         return this.playerNumber;     }          public int makeMove() {         System.out.println("Enter the coloumn num to put your token");         return scanner.nextInt();     }          public String toString(){         return "Player " +playerNumber+ " is " + playerName;     }        }