backspace.setOnAction(e -> {
KeyEvent press = new KeyEvent(backspace, textField, KeyEvent.KEY_PRESSED, "", "", KeyCode.BACK_SPACE, false, false, false, false);
textField.fireEvent(press);
KeyEvent typed = new KeyEvent(backspace, textField, KeyEvent.KEY_TYPED, "", "", KeyCode.UNDEFINED, false, false, false, false);
textField.fireEvent(typed);
KeyEvent release = new KeyEvent(backspace, textField, KeyEvent.KEY_RELEASED, "", "", KeyCode.BACK_SPACE, false, false, false, false);
textField.fireEvent(release);
});