/*
 * Empty Stylesheet file.
 */

.mainFxmlClass {
background-color: lightgreen;
}
.Button {
    background-color: orange;
}

/*
 * Empty Stylesheet file.
 */

.mainFxmlClass {
    background-color: lightgreen;
}
.Button {
    background-color: orange;
}

Set right fxml and link with methode for a button
Set right fxml and link with methode for a button