Hello,  I thought I was on the right track but nothing is showing up on the GUI when I try to test it.  

    public Move getPlayerMove(int row, int col) {

        Move m= new MoveImpl(mainPlayer,row,col); //mainPlayer = either player is X or O

        allMoves.add(m);  //allMoves = stack array with all the moves

        if(whatTurn==Player.O){

            theBoard[m.getRow()][m.getCol()] = 'O';   //theBoard = 2d array of the board

            whatTurn=Player.X;

        }

        else

        {

            theBoard[m.getRow()][m.getCol()] = 'X';

            whatTurn=Player.O;

        }

        return m;        

    }

My autoTurn is similar to this.  Am I doing something wrong?

Would you say it was wrong to make a separate variable to keep track of the turns?   I changed the code a bit, but still no dice.  

    public Move getPlayerMove(int row, int col) {

        Move m= new MoveImpl(mainPlayer,row,col);

        allMoves.add(m);

        if(mainPlayer==Player.O){

            theBoard[m.getRow()][m.getCol()] = 'O';

        }

        else

        {

            theBoard[m.getRow()][m.getCol()] = 'X';

        }

        switchTurn(whatTurn);

        return m;

    }

    private void switchTurn(Player t)

    {

        if(t==Player.O)

        {

            whatTurn=Player.X;

        }

        else

        {

            whatTurn=Player.X;

        }

    }

You should store Move's inside a stack and loop through each element in your stack inside the getBoard() method. Doing this also makes implementing the undo and redo buttons significantly easier as well as guarantee your moves actually display on the GUI.

private Stack<Move> nameofyourstackhere = new Stack<>();

public Character[][] getBoard() {

for (Move m : this.nameofyourstackhere) {
            this.board[m.getRow()][m.getCol()] = m.getPlayer().toString() .charAt(0);

        }

}