AskForBetController.java

package hepia;

import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.stage.Stage;

public class AskForBetController extends BlackJackController {
    @FXML
    private TextField inputBet;
    @FXML
    private Button btnSetBet;

    @FXML
    public void initialize() {
        filterInputs(inputBet);

        btnSetBet.disableProperty().bind(inputBet.textProperty().isEmpty());
    }

    private void filterInputs(TextField inputField) {
        inputField.addEventFilter(javafx.scene.input.KeyEvent.KEY_TYPED, event -> {
            if (!event.getCharacter().matches("[0-9]")) {
                event.consume();
            }
        });
    }

    @FXML
    protected void setHumanBet() {
        Stage currentStage = (Stage) btnSetBet.getScene().getWindow();
        currentStage.close();

        humanPlayers.add(new HumanPlayer(Integer.parseInt(inputBet.getText())));
    }
}