Thread: Problem with Tic Tac Toe Program

Hey, I recently started learning Java and I am creating a tic tac toe program. Every time I run the program and a player enters the position they would like to place their character in it says "Error! Position is not empty anymore". It still places the character in the space though. I can't figure out how to fix this. Please help?

public class TicTacToe {
 
	public static void main(String[] args) {
 
		char[][] board = new char[3][3];
		int winner = 1;
 
		boolean checkWinner = false;
 
		resetBoard(board);
 
		printBoard(board); 
 
		char curPlayer = PLAYER1; 
		while (!checkWinner) {
			Out.print("\n \nCurrent Player: " + curPlayer);
			Out.println();
			Out.print("Enter row: ");
			int row = enterPosition(0, 2);
			Out.println();
			Out.print("Enter Column: ");
			int column = enterPosition(0, 2);
			Out.println();
			// right
			boolean setPlayerAtPosition = setPlayerAtPosition(board, row, column, curPlayer);
			if (setPlayerAtPosition == true) {
				board[row][column] = curPlayer;
 
			}
 
			playerMove(board, row, column, curPlayer);
 
			if(setPlayerAtPosition) {
			if (curPlayer == PLAYER1) {
				curPlayer = PLAYER2;
			} else {
				curPlayer = PLAYER1;
			}}
			printBoard(board);
 
			checkWinner = checkWinner(board, row);
 
			if(curPlayer == 1) {
				winner = 2;
			}else {
				winner = 1;
			}
			if(checkWinner) {
				Out.println("\nGame Over");
				Out.println("Player " + winner + " wins!");
			}
		}
 
	} // end main
 
	static char EMPTY = (' ');
	static char PLAYER1 = ('X');
	static char PLAYER2 = ('O');
 
	static void resetBoard(char[][] board) { // sets all fields to EMPTY
 
		for (int i = 0; i < 3; i++) {
			for (int j = 0; j < 3; j++) {
				board[i][j] = EMPTY;
			}
		}
	} // end resetBoard
 
	static void printBoard(char[][] board) {
 
 
		Out.println("       0      1      2");
 
 
		for (int i = 0; i < 3; i++) { // i = row
			for (int j = 0; j < 3; j++) { // j = column
				Out.print("\t" + board[i][j]);
				if (j == 0 || j == 1) {
					Out.print("  |");
				}
 
			}
			if (i == 0) {
				Out.println("0");
				Out.print("\n     -------------------- \n");
 
 
			}  
			if (i == 1) {
				Out.println("1");
				Out.print("\n     -------------------- \n");
			}
			if (i == 2) {
				Out.println("2");
			}
 
		}
 
	} // end of printBoard
 
	static int enterPosition(int min, int max) { // lowest and highest possible number given to method
 
		int position = -1;
 
		while (position < min || position > max) {
			position = In.readInt();
			if (position < min || position > max) {
				Out.println("Error! Value is not in the allowed range (0 - 2)");
			}
		}
		return position;
 
	} // end enterPostion
 
	static boolean setPlayerAtPosition(char[][] board, int row, int column, char player) {
		boolean setPlayerAtPosition = false;
		if (board[row][column] == EMPTY) {
			setPlayerAtPosition = true;
		}
		if (board[row][column] == PLAYER1 || board[row][column] == PLAYER2) {
			Out.println("Error! This position is not empty anymore!");
 
		}
		return setPlayerAtPosition;
 
	}// end setPlayerAtPosition
 
	static boolean activeGame() {
		return true;
	} // end of activeGame
 
	static void playerMove(char[][] board, int row, int column, char curPlayer) {
 
		if (setPlayerAtPosition(board, row, column, curPlayer) == true) {
			board[row][column] = curPlayer;
 
		}
	}// end playerMove
 
	static boolean checkWinner(char[][] board, int row) {
		boolean checkWinner = false;
 
		for (row = 0; row < 3; row++) {
			if (board[row][0] == board[row][1] && board[row][1] == board[row][2] && board[row][0] != EMPTY) {
				checkWinner = true;
			}
 
		}
		for (row = 0; row < 3; row++) {
			if (board[0][row] == board[1][row] && board[1][row] == board[2][row] && board[0][row] != EMPTY) {
				checkWinner = true;
			}
		}
		return checkWinner;
	} // end checkWinner
 
}// end class