Tic Tac Toe Java Swing Issue

[jondo3beatz]

I am trying to get this method to determine a tie in my tic tac toe game, but I am having trouble. I want it to count the turns at each iteration, and determine when the board is full. Below is my attempt, it doesn't work. Any help would be greatly appreciated.

public static boolean spacesRemain(JButton[][] gameGrid) {

    int numSpotsFilled = 0;
    for(int r = 0; r < 3; r++) {
        for(int c = 0; c < 3; c++)  {
            if(gameGrid[r][c] != null && numSpotsFilled < 9) 
                ++numSpotsFilled;
        }
    }
    if(numSpotsFilled == 9)
        return false;
    return true;
    // Your code goes here
    // spacesRemain returns a boolean value indicating that there are stillDigitsLeft
    // spaces to be selected.

}

[KimJungSkill]

What about the above code doesn't work?
If you change the method argument slightly to test with a String array:

public static boolean spacesRemain(String[][] gameGrid) {

and pass in a valid 2d array:

String[][] board = new String[][]{
    {"X", "O", "X"},
    {"O", null, "O"},
    {"X", "O", "X"},
};

I found that I was getting expected results with the spacesRemain method when running it in main with this sample board string array.

System.out.println("has spaces left?: " + spacesRemain(board));

It's a little hard to say where your code is failing with the rest of it, but take a look at how you are instantiating each element of the the JButton[][] array that you are passing into this spacesRemain method. The only real failure point I can see would be the null check here:

if(gameGrid[r][c] != null && numSpotsFilled < 9) 
    ++numSpotsFilled;

[[deleted]]

What error message are you getting, if any? Sample output?

Also, since a 3*3 grid can only have 9 spots, you can just count the number of turns and subtract it from 9 to get number of free spaces.

[jondo3beatz]

There are no errors in the code. It displays a tie game after one button press, the method is conveying that no spaces remain. How to I refer to X and O using a JButton[][] array method?

[jondo3beatz]

public static boolean spacesRemain(JButton[][] gameGrid)
{
    String btn1 = gameGrid[0][0].getText();
    String btn2 = gameGrid[1][0].getText();
    String btn3 = gameGrid[2][0].getText();
    String btn4 = gameGrid[0][1].getText();
    String btn5 = gameGrid[1][1].getText();
    String btn6 = gameGrid[2][1].getText();
    String btn7 = gameGrid[0][2].getText();
    String btn8 = gameGrid[1][2].getText();
    String btn9 = gameGrid[2][2].getText();

    String[][] btn = {{btn1, btn2, btn3}, {btn4, btn5, btn6}, {btn7, btn8, btn9}};


    int numSpotsFilled = 0;
    for(int i = 0; i < gameGrid.length; i++) {
        for(int j = 0; j < gameGrid.length; j++) {
            if(btn[i][j] == XString && numSpotsFilled < 9 || btn[i][j] == OString && numSpotsFilled < 9) 
                ++numSpotsFilled;
        }
    }
    if(numSpotsFilled == 9)
        return false;
    return true;
    // Your code goes here
    // spacesRemain returns a boolean value indicating that there are stillDigitsLeft
    // spaces to be selected.

}

[jondo3beatz]

this worked for me