Lab 01 Tic Tac Toe Objective: Write a class called TicTacToeBoard which is used by a...
Lab 01
Tic Tac Toe
Objective:
Write a class called TicTacToeBoard which is used by a driver to play a game of Tic Tac Toe. Download the driver which contains the game loop and the user input. DO NOT MODIFY THE DRIVER!
The class TicTacToeBoard needs to have the following:
Instance Variables
A 2D 3x3 matrix of Strings called spaces. This will be used to select the where the player put their marker
Class Variables (these need to be public and constant)
A String called EMPTY_SPACE that
Homework Answers
Program Code:
//TicTacToeBoard class: that creates the board and contains the logic to
//dispaly the board while playing and displays the winners
public class TicTacToeBoard
{
//2-D String array
String [][]spaces=new String[3][3];
//static variables
String EMPTY_SPACE="_";
static String X_SPACE="X";
static String O_SPACE="O";
//constructor
public TicTacToeBoard()
{
initilaizeBoard();
}
//initialises the board to the initial state
public void initilaizeBoard()
{
for(int i=0;i<spaces.length;i++)
for(int j=0;j<spaces[i].length;j++)
spaces[i][j]=EMPTY_SPACE;
}
//checks the cells in the board
private boolean checkHorizontalVertical(String c1, String c2, String c3)
{
return ((!c1.equals("_")) && (c1.equals(c2)) && (c2.equals(c3)));
}
//clears the board: re-initializes to its original state
public void clearBoard()
{
initilaizeBoard();
}
//drawBoard method will displays the board
public void drawBoard()
{
for (int i = 0; i < 3; i++)
{
System.out.print("| ");
for (int j = 0; j < 3; j++)
{
System.out.print(spaces[i][j] + " | ");
}
System.out.println();
}
}
//this method checks for the row wise cells whether they are filled
//and are filled with the same values
public boolean checkHorizontalVictory()
{
for (int i = 0; i < 3; i++)
{
if (checkHorizontalVertical(spaces[i][0], spaces[i][1], spaces[i][2]) == true)
{
return true;
}
}
return false;
}
//this method checks for the column wise cells whether they are filled
//and are filled with the same values
public boolean checkVerticalVictory()
{
for (int i = 0; i < 3; i++) {
if (checkHorizontalVertical(spaces[0][i], spaces[1][i], spaces[2][i]) == true) {
return true;
}
}
return false;
}
//this method checks for the diagonal wise cells whether they are filled
//and are filled with the same values
public boolean checkDiagonalVictory()
{
return ((checkHorizontalVertical(spaces[0][0], spaces[1][1], spaces[2][2]) == true) || (checkHorizontalVertical(spaces[0][2], spaces[1][1], spaces[2][0]) == true));
}
//this method will declares the winner by looking
//over all the cell in the board
public boolean checkVictory()
{
return (checkHorizontalVictory() || checkVerticalVictory() || checkDiagonalVictory());
}
//this method checks whether the board is filled or not
public boolean checkFilledBoard()
{
boolean isFull = true;
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
if (spaces[i][j].equals("_")) {
isFull = false;
}
}
}
return isFull;
}
//this method will fill the cells in the board depending
//on the user input coordinates
public boolean setSpace(int x, int y, String marker )
{
if ((x >= 0) && (x < 3))
{
if ((y >= 0) && (y<3))
{
if (spaces[x][y].equals("_"))
{
spaces[x][y] = marker;
return true;
}
}
}
return false;
}
}
------------------------------------------------------------------------------------------------
//TicTacToeGame.java
import java.util.Scanner;
public class TicTacToeGame
{
public static void main(String[] args)
{
//Constructs the tic tac toe board
TicTacToeBoard board = new TicTacToeBoard();
//Sets up the scanner for user input
Scanner keyboard = new Scanner(System.in);
//These hold the coordinates that the user will enter to put their marker
//X's are player 1 and O's are player two
int xVal = 0;
int yVal = 0;
//Runs the game loop
boolean gameOver = false;
//Determines if it is player 1 or player 2
boolean player1Turn = true;
System.out.println("Welcome to Tic Tac Toe");
while(gameOver == false)//Game loop
{
board.drawBoard();
System.out.println("Enter coordinates player "+(player1Turn?"1":"2"));
xVal = keyboard.nextInt();
yVal = keyboard.nextInt();
//Using the x and y val it attempts to set that space to an X or O based on whose turn it is.
if(board.setSpace(xVal, yVal, player1Turn?TicTacToeBoard.X_SPACE:TicTacToeBoard.O_SPACE))
{
//After the marker is placed a winning configuration is searched
if(board.checkVictory())
{
board.drawBoard();
//Depending who put the marker down determines the winner
System.out.println("Player "+ (player1Turn?"1":"2")+ " wins!");
//Determines whether or not to repeat the game
System.out.println("Would you like to play again? Enter \"yes\" or \"no\"");
String decision = keyboard.next();
if(decision.equalsIgnoreCase("no"))//ends the game
{
System.out.println("Goodbye");
break;
}
//Clears the board and starts over with player 1
board.clearBoard();
player1Turn = true;
}
//Checks if the board is completely filled
else if(board.checkFilledBoard())
{
System.out.println("Board is filled!");
//Determines whether or not to repeat the game
System.out.println("Would you like to play again? Enter \"yes\" or \"no\"");
String decision = keyboard.next();
if(decision.equalsIgnoreCase("no"))//ends the game
{
System.out.println("Goodbye");
break;
}
//Clears the board and starts over with player 1
board.clearBoard();
player1Turn = true;
}
else
{
//Changes the player's turn
player1Turn = !player1Turn;
}
}
else
{
//If a space wasn't empty or was out of the board range then prompt with an error
System.out.println("That's an invalid space. Try again.");
}
}
}
}
------------------------------------------------------------------------------------------------
Sample output:
Welcome to Tic Tac Toe
| _ | _ | _ |
| _ | _ | _ |
| _ | _ | _ |
Enter coordinates player 1
0
2
| _ | _ | X |
| _ | _ | _ |
| _ | _ | _ |
Enter coordinates player 2
1
0
| _ | _ | X |
| O | _ | _ |
| _ | _ | _ |
Enter coordinates player 1
0 0
| X | _ | X |
| O | _ | _ |
| _ | _ | _ |
Enter coordinates player 2
2 0
| X | _ | X |
| O | _ | _ |
| O | _ | _ |
Enter coordinates player 1
0 1
| X | X | X |
| O | _ | _ |
| O | _ | _ |
Player 1 wins!
Would you like to play again? Enter "yes" or "no"
no
Goodbye
Program Code:
//TicTacToeBoard class: that creates the board and contains the logic to
//dispaly the board while playing and displays the winners
public class TicTacToeBoard
{
//2-D String array
String [][]spaces=new String[3][3];
//static variables
String EMPTY_SPACE="_";
static String X_SPACE="X";
static String O_SPACE="O";
//constructor
public TicTacToeBoard()
{
initilaizeBoard();
}
//initialises the board to the initial state
public void initilaizeBoard()
{
for(int i=0;i<spaces.length;i++)
for(int j=0;j<spaces[i].length;j++)
spaces[i][j]=EMPTY_SPACE;
}
//checks the cells in the board
private boolean checkHorizontalVertical(String c1, String c2, String c3)
{
return ((!c1.equals("_")) && (c1.equals(c2)) && (c2.equals(c3)));
}
//clears the board: re-initializes to its original state
public void clearBoard()
{
initilaizeBoard();
}
//drawBoard method will displays the board
public void drawBoard()
{
for (int i = 0; i < 3; i++)
{
System.out.print("| ");
for (int j = 0; j < 3; j++)
{
System.out.print(spaces[i][j] + " | ");
}
System.out.println();
}
}
//this method checks for the row wise cells whether they are filled
//and are filled with the same values
public boolean checkHorizontalVictory()
{
for (int i = 0; i < 3; i++)
{
if (checkHorizontalVertical(spaces[i][0], spaces[i][1], spaces[i][2]) == true)
{
return true;
}
}
return false;
}
//this method checks for the column wise cells whether they are filled
//and are filled with the same values
public boolean checkVerticalVictory()
{
for (int i = 0; i < 3; i++) {
if (checkHorizontalVertical(spaces[0][i], spaces[1][i], spaces[2][i]) == true) {
return true;
}
}
return false;
}
//this method checks for the diagonal wise cells whether they are filled
//and are filled with the same values
public boolean checkDiagonalVictory()
{
return ((checkHorizontalVertical(spaces[0][0], spaces[1][1], spaces[2][2]) == true) || (checkHorizontalVertical(spaces[0][2], spaces[1][1], spaces[2][0]) == true));
}
//this method will declares the winner by looking
//over all the cell in the board
public boolean checkVictory()
{
return (checkHorizontalVictory() || checkVerticalVictory() || checkDiagonalVictory());
}
//this method checks whether the board is filled or not
public boolean checkFilledBoard()
{
boolean isFull = true;
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
if (spaces[i][j].equals("_")) {
isFull = false;
}
}
}
return isFull;
}
//this method will fill the cells in the board depending
//on the user input coordinates
public boolean setSpace(int x, int y, String marker )
{
if ((x >= 0) && (x < 3))
{
if ((y >= 0) && (y<3))
{
if (spaces[x][y].equals("_"))
{
spaces[x][y] = marker;
return true;
}
}
}
return false;
}
}
------------------------------------------------------------------------------------------------
//TicTacToeGame.java
import java.util.Scanner;
public class TicTacToeGame
{
public static void main(String[] args)
{
//Constructs the tic tac toe board
TicTacToeBoard board = new TicTacToeBoard();
//Sets up the scanner for user input
Scanner keyboard = new Scanner(System.in);
//These hold the coordinates that the user will enter to put their marker
//X's are player 1 and O's are player two
int xVal = 0;
int yVal = 0;
//Runs the game loop
boolean gameOver = false;
//Determines if it is player 1 or player 2
boolean player1Turn = true;
System.out.println("Welcome to Tic Tac Toe");
while(gameOver == false)//Game loop
{
board.drawBoard();
System.out.println("Enter coordinates player "+(player1Turn?"1":"2"));
xVal = keyboard.nextInt();
yVal = keyboard.nextInt();
//Using the x and y val it attempts to set that space to an X or O based on whose turn it is.
if(board.setSpace(xVal, yVal, player1Turn?TicTacToeBoard.X_SPACE:TicTacToeBoard.O_SPACE))
{
//After the marker is placed a winning configuration is searched
if(board.checkVictory())
{
board.drawBoard();
//Depending who put the marker down determines the winner
System.out.println("Player "+ (player1Turn?"1":"2")+ " wins!");
//Determines whether or not to repeat the game
System.out.println("Would you like to play again? Enter \"yes\" or \"no\"");
String decision = keyboard.next();
if(decision.equalsIgnoreCase("no"))//ends the game
{
System.out.println("Goodbye");
break;
}
//Clears the board and starts over with player 1
board.clearBoard();
player1Turn = true;
}
//Checks if the board is completely filled
else if(board.checkFilledBoard())
{
System.out.println("Board is filled!");
//Determines whether or not to repeat the game
System.out.println("Would you like to play again? Enter \"yes\" or \"no\"");
String decision = keyboard.next();
if(decision.equalsIgnoreCase("no"))//ends the game
{
System.out.println("Goodbye");
break;
}
//Clears the board and starts over with player 1
board.clearBoard();
player1Turn = true;
}
else
{
//Changes the player's turn
player1Turn = !player1Turn;
}
}
else
{
//If a space wasn't empty or was out of the board range then prompt with an error
System.out.println("That's an invalid space. Try again.");
}
}
}
}
------------------------------------------------------------------------------------------------
Sample output:
Welcome to Tic Tac Toe
| _ | _ | _ |
| _ | _ | _ |
| _ | _ | _ |
Enter coordinates player 1
0
2
| _ | _ | X |
| _ | _ | _ |
| _ | _ | _ |
Enter coordinates player 2
1
0
| _ | _ | X |
| O | _ | _ |
| _ | _ | _ |
Enter coordinates player 1
0 0
| X | _ | X |
| O | _ | _ |
| _ | _ | _ |
Enter coordinates player 2
2 0
| X | _ | X |
| O | _ | _ |
| O | _ | _ |
Enter coordinates player 1
0 1
| X | X | X |
| O | _ | _ |
| O | _ | _ |
Player 1 wins!
Would you like to play again? Enter "yes" or "no"
no
Goodbye
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