Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Added java code for Tic-Tac-Toe game #327

Open
wants to merge 1 commit into
base: main
Choose a base branch
from
Open
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
174 changes: 174 additions & 0 deletions Tic-Tac-Toe.java
Original file line number Diff line number Diff line change
@@ -0,0 +1,174 @@
// A simple program to demonstrate
// Tic-Tac-Toe Game.
import java.util.*;

public class GFG {

static String[] board;
static String turn;


// CheckWinner method will
// decide the combination
// of three box given below.
static String checkWinner()
{
for (int a = 0; a < 8; a++) {
String line = null;

switch (a) {
case 0:
line = board[0] + board[1] + board[2];
break;
case 1:
line = board[3] + board[4] + board[5];
break;
case 2:
line = board[6] + board[7] + board[8];
break;
case 3:
line = board[0] + board[3] + board[6];
break;
case 4:
line = board[1] + board[4] + board[7];
break;
case 5:
line = board[2] + board[5] + board[8];
break;
case 6:
line = board[0] + board[4] + board[8];
break;
case 7:
line = board[2] + board[4] + board[6];
break;
}
//For X winner
if (line.equals("XXX")) {
return "X";
}

// For O winner
else if (line.equals("OOO")) {
return "O";
}
}

for (int a = 0; a < 9; a++) {
if (Arrays.asList(board).contains(
String.valueOf(a + 1))) {
break;
}
else if (a == 8) {
return "draw";
}
}

// To enter the X Or O at the exact place on board.
System.out.println(
turn + "'s turn; enter a slot number to place "
+ turn + " in:");
return null;
}

// To print out the board.
/* |---|---|---|
| 1 | 2 | 3 |
|-----------|
| 4 | 5 | 6 |
|-----------|
| 7 | 8 | 9 |
|---|---|---|*/

static void printBoard()
{
System.out.println("|---|---|---|");
System.out.println("| " + board[0] + " | "
+ board[1] + " | " + board[2]
+ " |");
System.out.println("|-----------|");
System.out.println("| " + board[3] + " | "
+ board[4] + " | " + board[5]
+ " |");
System.out.println("|-----------|");
System.out.println("| " + board[6] + " | "
+ board[7] + " | " + board[8]
+ " |");
System.out.println("|---|---|---|");
}

public static void main(String[] args)
{
Scanner in = new Scanner(System.in);
board = new String[9];
turn = "X";
String winner = null;

for (int a = 0; a < 9; a++) {
board[a] = String.valueOf(a + 1);
}

System.out.println("Welcome to 3x3 Tic Tac Toe.");
printBoard();

System.out.println(
"X will play first. Enter a slot number to place X in:");

while (winner == null) {
int numInput;

// Exception handling.
// numInput will take input from user like from 1 to 9.
// If it is not in range from 1 to 9.
// then it will show you an error "Invalid input."
try {
numInput = in.nextInt();
if (!(numInput > 0 && numInput <= 9)) {
System.out.println(
"Invalid input; re-enter slot number:");
continue;
}
}
catch (InputMismatchException e) {
System.out.println(
"Invalid input; re-enter slot number:");
continue;
}

// This game has two player x and O.
// Here is the logic to decide the turn.
if (board[numInput - 1].equals(
String.valueOf(numInput))) {
board[numInput - 1] = turn;

if (turn.equals("X")) {
turn = "O";
}
else {
turn = "X";
}

printBoard();
winner = checkWinner();
}
else {
System.out.println(
"Slot already taken; re-enter slot number:");
}
}

// If no one win or lose from both player x and O.
// then here is the logic to print "draw".
if (winner.equalsIgnoreCase("draw")) {
System.out.println(
"It's a draw! Thanks for playing.");
}

// For winner -to display Congratulations! message.
else {
System.out.println(
"Congratulations! " + winner
+ "'s have won! Thanks for playing.");
}
in.close();
}
}