::: {.cell .markdown id=”2P4vPyRrX7Fz”}
toc: true comments: true layout: post title: Java Console Game Hacks description: NEW TOOLS CHECK courses: { csa: {week: 1} } type: hacks --- :::
::: {.cell .markdown id=”24EiTWJIYfjC”}
Notes for Tic-Tac-Toe Game Code
This markdown file provides an explanation of the key concepts and tools used in the original Tic-Tac-Toe game code.
Concepts and Tools Used
1. Static and Final Variables {#1-static-and-final-variables}
- The
SIZEvariable is declared asprivate static final int SIZE = 3;. staticindicates thatSIZEis a class-level variable and shared among all instances of the class.finalensures thatSIZEcannot be changed after its initial assignment.
2. Constructor Method {#2-constructor-method}
- The constructor
public TicTacToeGame()initializes the game when an instance of theTicTacToeGameclass is created. - It uses nested loops to fill the
board2D array with empty cells ('-').
3. Conditional Statements (if-else) {#3-conditional-statements-if-else}
- The player chooses their mark ('X' or 'O') using an if-else statement based on user input.
4. Loops (for and while) {#4-loops-for-and-while}
forloops are used for iterating through rows and columns of the game board.- A
whileloop is used in thecomputerTurn()method to ensure the computer selects a valid move.
5. Objects and Object Instantiation {#5-objects-and-object-instantiation}
- An instance of the
TicTacToeGameclass is created usingTicTacToeGame game = new TicTacToeGame();. - This instance allows the game to be played through the
playGame()method.
6. Arrays (2D Array) {#6-arrays-2d-array}
- The
boardvariable is a 2D array (char[][] board) that represents the Tic-Tac-Toe game board.
7. Methods and Functionality {#7-methods-and-functionality}
- The code includes various methods to manage gameplay:
isBoardFull(),printBoard(),checkWin(),checkRowsForWin(),checkColumnsForWin(),checkDiagonalsForWin(),changePlayer(),computerTurn(),isValidMove(), andplaceMark().
8. Random Number Generation {#8-random-number-generation}
- The
Randomclass is used to generate random numbers for the computer's move selection.
Running the Game
- Create an instance of the
TicTacToeGameclass:TicTacToeGame game = new TicTacToeGame();. - Start playing the game by calling the
playGame()method on the created instance:game.playGame();. :::
::: {.cell .code id=”FSITo48zX7F1” outputId=”6c193a54-011e-4661-fa27-936042325b8b”}
import java.util.Random;
import java.util.Scanner;
public class TicTacToeGame {
private static final int SIZE = 3;
private char[][] board = new char[SIZE][SIZE];
private char playerMark, computerMark;
private Random random = new Random();
public TicTacToeGame() {
for (int i = 0; i < SIZE; i++) {
for (int j = 0; j < SIZE; j++) {
board[i][j] = '-';
}
}
}
public boolean isBoardFull() {
for (int i = 0; i < SIZE; i++) {
for (int j = 0; j < SIZE; j++) {
if (board[i][j] == '-') {
return false;
}
}
}
return true;
}
public void printBoard() {
for (int i = 0; i < SIZE; i++) {
for (int j = 0; j < SIZE; j++) {
System.out.print(board[i][j] + " ");
}
System.out.println();
}
}
public boolean checkWin() {
return checkRowsForWin() || checkColumnsForWin() || checkDiagonalsForWin();
}
private boolean checkRowsForWin() {
for (int i = 0; i < SIZE; i++) {
if (board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][0] != '-') {
return true;
}
}
return false;
}
private boolean checkColumnsForWin() {
for (int i = 0; i < SIZE; i++) {
if (board[0][i] == board[1][i] && board[1][i] == board[2][i] && board[0][i] != '-') {
return true;
}
}
return false;
}
private boolean checkDiagonalsForWin() {
return (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[0][0] != '-') ||
(board[0][2] == board[1][1] && board[1][1] == board[2][0] && board[0][2] != '-');
}
public void changePlayer() {
playerMark = (playerMark == '❌') ? '🔴' : '❌';
computerMark = (computerMark == '❌') ? '🔴' : '❌';
}
public void computerTurn() {
int computerMove;
while (true) {
computerMove = random.nextInt(9) + 1;
if (isValidMove(String.valueOf(computerMove))) {
break;
}
}
System.out.println("Computer chose " + computerMove);
placeMark(String.valueOf(computerMove), computerMark);
}
public boolean isValidMove(String position) {
switch (position) {
case "1":
return (board[0][0] == '-');
case "2":
return (board[0][1] == '-');
case "3":
return (board[0][2] == '-');
case "4":
return (board[1][0] == '-');
case "5":
return (board[1][1] == '-');
case "6":
return (board[1][2] == '-');
case "7":
return (board[2][0] == '-');
case "8":
return (board[2][1] == '-');
case "9":
return (board[2][2] == '-');
default:
return false;
}
}
public void placeMark(String position, char mark) {
switch (position) {
case "1":
board[0][0] = mark;
break;
case "2":
board[0][1] = mark;
break;
case "3":
board[0][2] = mark;
break;
case "4":
board[1][0] = mark;
break;
case "5":
board[1][1] = mark;
break;
case "6":
board[1][2] = mark;
break;
case "7":
board[2][0] = mark;
break;
case "8":
board[2][1] = mark;
break;
case "9":
board[2][2] = mark;
break;
default:
System.out.println("Invalid position");
}
}
public void playGame() {
Scanner scan = new Scanner(System.in);
System.out.println("Welcome to Raunak's Tic Tac Toe!");
System.out.println("To play, enter any number from 1-9 to indicate your move!");
printBoard();
System.out.println("Choose your mark: ❌ or 🔴");
playerMark = scan.nextLine().charAt(0);
if (playerMark == '❌') {
computerMark = '🔴';
} else {
computerMark = '❌';
}
while (true) {
System.out.println("Enter your placement (1-9):");
String userInput = scan.nextLine();
if (isValidMove(userInput)) {
placeMark(userInput, playerMark);
printBoard();
if (checkWin()) {
System.out.println("Player wins!");
break;
}
if (isBoardFull()) {
System.out.println("It's a tie!");
break;
}
computerTurn();
printBoard();
if (checkWin()) {
System.out.println("Computer wins!");
break;
}
if (isBoardFull()) {
System.out.println("It's a tie!");
break;
}
} else {
System.out.println("Invalid position. Try again.");
}
}
}
}
TicTacToeGame game = new TicTacToeGame();
game.playGame();
::: {.output .stream .stdout} Welcome to Raunak’s Tic Tac Toe! To play, enter any number from 1-9 to indicate your move! - - - - - - - - - Choose your mark: ❌ or 🔴 Enter your placement (1-9): ❌ - - - - - - - - Computer chose 4 ❌ - - 🔴 - - - - - Enter your placement (1-9): Invalid position. Try again. Enter your placement (1-9): ❌ ❌ - 🔴 - - - - - Computer chose 8 ❌ ❌ - 🔴 - - - 🔴 - Enter your placement (1-9): ❌ ❌ ❌ 🔴 - - - 🔴 - Player wins! ::: :::