Using SceneBuilder to Create a User Interface - JavaFX 8: A Definitive Guide to Building Desktop, Mobile, and Embedded Java Clients - page 119

public ProdId() throws IOException {
FXMLLoader fxmlLoader = new FXMLLoader(ProdId.class.getResource("ProdId.fxml"));
fxmlLoader.setRoot(this);
fxmlLoader.setController(this);
fxmlLoader.load();
}
@FXML
public void initialize() {
prefix.textProperty().addListener((observable, oldValue, newValue) -> {
switch (newValue) {
case "A":
case "B":
case "C":
prodCode.requestFocus();
break;
default:
prefix.setText("");
}
});
prodCode.textProperty().addListener((observable, oldValue, newValue) -> {
if (newValue.length() > 6) {
prodCode.setText(newValue.substring(0, 6));
} else if (newValue.length() == 0) {
prefix.requestFocus();
}
});
prodId.bind(prefix.textProperty().concat("-").concat(prodCode.textProperty()));
}
public String getProdId() {
return prodId.get();
}
public StringProperty prodIdProperty() {
return prodId;
}
public void setProdId(String prodId) {
this.prodId.set(prodId);
}
}
Listing 3-28. CustomComponent.java
package projavafx.customcomponent;
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Label;