How I Can Print the printBoard with Modification?
I Write a Tictactoe Game. Here I Create a 3X3 Table with Char [][] Board, Then Call Method printBoard(). I Input for Example X_X_O____, and Print This Table...
I write a TicTacToe game.
Here I create a 3x3 table with char [][] board, then call method printBoard(). I input for example X_X_O____, and print this table with these characters.
In the changeBoard() method I want to input coordinates of board[][] and if there is char _ this will be replaced with X. I give the coordinates at compile to see that the coordinate is _ but when call method printBoard(), the console prints the same board without any changes. Can you please help me as I don't know what I am doing wrong?
import java.util.Scanner;
public class TicTacToe {
private char[][] board = new char[3][3];
private String state;
private int n;
private int m;
private int i;
private int j;
Scanner sc = new Scanner(System.in);
public TicTacToe() {
System.out.print("Enter cells: ");
this.state = sc.nextLine();
}
public void printBoard() {
int nextChar = 0;
System.out.println("---------");
for (i = 0; i < 3; i++) {
System.out.print("| ");
for (j = 0; j < 3; j++) {
board[i][j] = state.charAt(nextChar++);
System.out.print(board[i][j] + " ");
}
System.out.println("|");
}
System.out.println("---------");
}
public void changeBoard() {
while (true) {
System.out.print("Enter the coordinates: ");
n = sc.nextInt();
m = sc.nextInt();
if (n < 1 || n > 3 || m < 1 || m > 3) {
System.out.println("Coordinates should be from 1 to 3!");
} else {
int x = n - 1;
int y = m - 1;
this.i = x;
this.j = y;
if (board[i][j] == '_') {
this.board[i][j] = 'X';
break;
} else {
System.out.println("This cell is occupied! Choose another one!");
}
}
}
// printBoard();
}
}
1 Answer
Why you use fields for your n, m, i, j? If you remove it, code will be cleaner.
Also, you change your board in changeBoard, but then in line board[i][j] = state.charAt(nextChar++); you erase your changes. You can move this from printBoard to constructor.
I think want to write something like this
class TicTacToe {
private char[][] board = new char[3][3];
Scanner sc = new Scanner(System.in);
public TicTacToe() {
int nextChar = 0;
System.out.print("Enter cells: ");
String state = sc.nextLine();
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
board[i][j] = state.charAt(nextChar++);
}
}
}
public void printBoard() {
System.out.println("---------");
for (int i = 0; i < 3; i++) {
System.out.print("| ");
for (int j = 0; j < 3; j++) {
System.out.print(board[i][j] + " ");
}
System.out.println("|");
}
System.out.println("---------");
}
public void changeBoard() {
while (true) {
System.out.print("Enter the coordinates: ");
int n = sc.nextInt();
int m = sc.nextInt();
if (n < 1 || n > 3 || m < 1 || m > 3) {
System.out.println("Coordinates should be from 1 to 3!");
} else {
int x = n - 1;
int y = m - 1;
if (board[x][y] == '_') {
this.board[x][y] = 'X';
break;
} else {
System.out.println("This cell is occupied! Choose another one!");
}
}
}
printBoard();
}
}
James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.
