TicTacToe Done

public class TicTacToe {

    // String[row][col]
    private String[][] board;
    private boolean xturn;
    String player;

    public TicTacToe(){
        board = new String[3][3];
        for(int i=0; i<3; i++){
            for(int j=0; j < 3; j++){
                board[i][j] = "-";
            }
        }
        xturn = false;
        player = "O";
    }

    public void printBoard(){
        System.out.println("  0 1 2");
        for(int i = 0; i < 3; i++){
            System.out.println(i + " " +board[i][0]
              + " " + board[i][1] + " " + board[i][2]);
        }
        if(!checkWin()){
            System.out.println("It is " + player + "'s turn.");
        }
    }

    public boolean isValid(int r, int c){
        if(board[r][c].equals("-")){
            return true;
        }
        return false;
    }

    public void placePlayer(int r, int c){
        if(xturn){
            player = "X";
            board[r][c] = player;
            player = "O";

        } else {
            player = "O";
            board[r][c] = player;
            player = "X";
        }
        xturn = !xturn;  //CHANGES PLAYERS
    }

    public boolean checkWin(){
        if(checkRow() || checkCol() || checkDiag()){
            return true;
        }
        return false;
    }

    public boolean checkRow(){
        for(int i = 0; i < 3; i++){
            if(board[i][0] == board[i][1] && board[i][1]== board[i][2]
              && board[i][0] != "-"){
                  return true;
              }
        }
        return false;
    }

    public boolean checkCol(){
        for(int i = 0; i < 3; i++){
            if(board[0][i] == board[1][i] && board[1][i]== board[2][i]
              && board[0][i] != "-"){
                  return true;
              }
        }
        return false;
    }

    public boolean checkDiag(){
        if(board[1][1] != "-"){
            if(board[0][0] == board[1][1] && board[1][1] == board[2][2]){
                return true;
            }
            if(board[2][0] == board[1][1] && board[1][1] == board[0][2]){
                return true;
            }
        }
        return false;
    }

    public String getPlayer(){
        if(player == "X"){
            player = "O";
        } else {
            player = "X";
        }
        return player;
    }

}



import java.util.Scanner;

public class MyProgram
{
    public static void main(String[] args)
    {
        TicTacToe thoe = new TicTacToe();
        int x;
        int y;
        Scanner sc = new Scanner(System.in);
        thoe.printBoard();
        while(!thoe.checkWin()){
            System.out.println("Which Row? ");
            x = Integer.valueOf(sc.nextLine());
            System.out.println("Which Column? ");
            y = Integer.valueOf(sc.nextLine());
            if(thoe.isValid(x,y)){
                thoe.placePlayer(x,y);
            } else {
                System.out.println("Invalid choice!");
            }

            thoe.printBoard();
        }
        System.out.println(thoe.getPlayer() + " wins!");


    }
}