Having troubles with making Tic Tac Toe#java

private static char[][] board;
private  char getCurrentPlayerMark(){
    return getPlayerMark;
}

public static void main(String[] args)
{
    Scanner scan = new Scanner(System.in);
    board = new char[3][3];
    char currentPlayerMark = 'x';
    initializeBoard();

    System.out.println("Tic-Tac-Toe!");
    do
        {
            System.out.println("Current board layout:");
            printBoard();
            int row;
            int col;
        do
            {
                System.out.println("Player " + getCurrentPlayerMark() + ", enter an empty row and column to place your mark!");
                row = scan.nextInt()-1;
                col = scan.nextInt()-1;
            }
        while (placeMark(row, col));
        changePlayer();
        }
    while(!checkForWin() && !isBoardFull());
    if (isBoardFull() && !checkForWin())
        {
            System.out.println("The game was a tie!");
        }
    else
     {
            System.out.println("Current board layout:");
            printBoard();
            changePlayer();
            System.out.println(Character.toUpperCase(getCurrentPlayerMark()) + " Wins!");
        }
}

public static void initializeBoard() {

    for (int i = 0; i < 3; i++) {


        for (int j = 0; j < 3; j++) {
            board[i][j] = '-';
        }
    }
}

public static 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 static boolean isBoardFull() {
    boolean isFull = true;

    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            if (board[i][j] == '-') {
                isFull = false;
            }
        }
}

    return isFull;
}

public static boolean checkForWin() {
    return (checkRowsForWin() || checkColumnsForWin() || checkDiagonalsForWin());
}


private static boolean checkRowsForWin() {
    for (int i = 0; i < 3; i++) {
        if (checkRowCol(board[i][0], board[i][1], board[i][2]) == true) {
            return true;
        }
    }
    return false;
}


private static boolean checkColumnsForWin() {
    for (int i = 0; i < 3; i++) {
            return true;
        }
    }
    return false;
}


private static boolean checkDiagonalsForWin() {
    return ((checkRowCol(board[0][0], board[1][1], board[2][2]) == true) || (checkRowCol(board[0][2], board[1][1], board[2][0]) == true));
}


private static boolean checkRowCol(char c1, char c2, char c3) {
    return ((c1 != '-') && (c1 == c2) && (c2 == c3));
}


public static void changePlayer() {
    if (currentPlayerMark == 'x') {
        currentPlayerMark = 'o';
   }
    else {
        currentPlayerMark = 'x';
    }
}

public static boolean placeMark(int row, int col) {


    if ((row >= 0) && (row < 3)) {
        if ((col >= 0) && (col < 3)) {
            if (board[row][col] == '-') {
                board[row][col] = currentPlayerMark;
                return true;
            }
        }
    }

    return false;