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Initialize the board
While there is not a winner and it is not a draw
Display the board
Get the player’s move and set the corresponding board position to “X”
Determine if the player wins
Compute the computer’s move and set the corresponding board position to “O”
Determine if the computer wins
The player will win if the current move will result in 3 “X”s in a row, column or diagonal (if the position) is on a diagonal.
The computer will win if the current move will result in 3 “O”s in a row, column or diagonal (if the position) is on a diagonal.
package tictactoe;
import java.util.Arrays;
import java.util.Scanner;
/**
*
* @
*/
public class TicTacToe {
private String board[][] = new String[3][3]; // to hold board contents
private int moveBoard[][] = new int[3][3]; // used to evaluate the computer move
private Scanner input = new Scanner(System.in);
private int playerX; // holds the row choice of the user
private int playerY; // holds the column choice of the user
public TicTacToe() {
initializeBoard();
}
// This method sets all positions in the board to " "
private void initializeBoard() {
for (String[] row : board) {
Arrays.fill(row, " ");
}
}
// This method will initialize the moveBoard prior to determining
// the next move. If the board contains a blank the position is set to 0
// otherwise the position is set to -10 because the position is filled and we
// don't want to be able to select the position
private void initializeMoveBoard() {
for (int row = 0; row < moveBoard.length; row++) {
for (int col = 0; col < moveBoard[row].length; col++) {
if (board[row][col].equals(" ")) {
moveBoard[row][col] = 0;
} else {
moveBoard[row][col] = -10;
}
}
}
}
// this method displays the board
public void displayBoard() {
System.out.println("\t 1 2 3");
System.out.println("\t-------------");
for (int row = 0; row < board.length; row++) {
System.out.print(" " + (row + 1) + "\t");
for (int col = 0; col < board[row].length; col++) {
System.out.print("| " + board[row][col] + " ");
}
System.out.println("|");
System.out.println("\t-------------");
}
}
// this method displays the moveBoard values. This is added for debugging
// purposes if required.
private void displayMoveBoard() {
for (int row = 0; row < moveBoard.length; row++) {
for (int col = 0; col < moveBoard[row].length; col++) {
System.out.printf("%2d ", moveBoard[row][col]);
}
System.out.println();
}
}
// This method gets a valid player move
private void getPlayerMove() {
do {
do {
System.out.print("Move (row col separated by blanks): ");
playerX = input.nextInt();
if (playerX < 1 || playerX > 3) {
System.out.println("Invalid row");
}
playerY = input.nextInt();
if (playerY < 1 || playerY > 3) {
System.out.println("Invalid column");
}
} while (playerX < 1 || playerX > 3 || playerY < 1 || playerY > 3);
if (!board[playerX - 1][playerY - 1].equals(" ")) {
System.out.println("Board at position " + playerX + " " + playerY
+ " is occupied");
}
} while (!board[playerX - 1][playerY - 1].equals(" "));
}
public void playGame() {
initializeBoard(); // reset the board for this game
initializeMoveBoard();
displayMoveBoard();
displayBoard();
getPlayerMove();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
TicTacToe game = new TicTacToe();
game.playGame();
}
}
It should be I have created so far
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