How to check character of ith row in 2D array?

Question

public static boolean won() {
    for(int i = 0; i < board.length; i++){
        for(int j = 0; j < board[i].length; j++){
            char column1 = board[i][0];
            char column2 = board[i][1];
            char column3 = board[i][2];
            char row1 = board[0][j];
            char row2 = board[1][j];
            char row3 = board[2][j];
            char diag1 = board[i][0];
            char diag2 = board[i][0];
            boolean[] winConditions; 
            winConditions[6] = {column1, column2, column3, row1, row2, row3};
            
            if(winCondition == player){
                System.out.println(player + " has won!");
            }
        }
    }
    return false; // TODO: replace with your own return statement.
}

I know this code is a mess and incorrect. Here 'board' is a 2d array that prints out the game for TicTacToe. I cannot change the class parameter.

I am trying to go create an array of character whose elemtents come from the 2d array - 'board'. I want to go through all over them and if one of the element in array is true, with all entries being 'player' (= 'X'/ = 'O') then this class will determine the winner.

I am trying to make an array 'winningConditons', from this, how would I make it go through all over the elements (that are my winning conditions) and check if any one is true?