Unable to use button[c][r].setText() method

import javafx.application.Application; import javafx.stage.Stage; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.control.Label; import javafx.scene.layout.GridPane; import javafx.scene.layout.BorderPane; import javafx.concurrent.Task; import javafx.event.EventHandler; import javafx.event.ActionEvent;

public class TootAndOtto extends Application implements EventHandler{ private static TootAndOtto theObject; private int row = 6; private int col = 6; private Button[][] button = new Button[row][col]; private boolean nextT = false; private boolean clickMade = true; private boolean won = true; private boolean filled = false;

@Override public void start(Stage primaryStage) { theObject = this; GridPane gridPane = new GridPane(); Button[][] button = new Button[row][col]; for(col = 0; col

} public void handle(ActionEvent e) { Button b = (Button)e.getSource(); int c = findCol(b); int r = findRow(b); setText(b); System.out.println(c); System.out.println(r);

} public int findCol(Button b) { int c = GridPane.getRowIndex(b); return c; } public int findRow(Button b) { int r = GridPane.getColumnIndex(b); return r; } public void setText(Button b) { int c = GridPane.getRowIndex(b); int r = GridPane.getColumnIndex(b); button[c][r].setText("x"); } /* if (button[r-1][c].getText().equals ("T")&&button[r-1][c].getText().equals ("O")) { if (nextT == true) { b.setText("T"); nextT = false; } else if (nextT == false) { b.setText("O"); nextT = true; } } } */ public static void main(String[] args) { Application.launch(args); }

}