How to replace the text in the buttons of my gridpane

Question

I've added 9 buttons to my gridpane using the following:

for (int r = 0; r < 3; r++) {
    for (int c = 0; c < 3; c++) {
        int number = 3 * r + c;
        Button button = new Button(String.valueOf(number));
        gridPane.add(button, c, r);
    }
}

I want to replace the text in these buttons when they are clicked, but how do I do that? There's no identificator when adding these buttons, and when I try to print all the children of the gridpane it just gives me the memory address.

Answer 1

you can set and anonymous event like

for (int r = 0; r < 3; r++) {
    for (int c = 0; c < 3; c++) {
        int number = 3 * r + c;
        Button button = new Button(String.valueOf(number));
        button.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent e) {
                ((Button)e.getSource()).setText("Accepted");
            }
        });
        gridPane.add(button, c, r);
    }
}