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How to add a separator for a choice box in JavaFX?
Choice box
In JavaFX a choice box is represented by the class javafx.scene.control.ChoiceBox<T>. You can create a choice box by instantiating this class. A choice box holds a small set of multiple choices and, allows you to select only one of them.
It has two states −
Showing − You can see the list of choices in a choice box.
Not Showing − You can see the current choice of the choice box
Separator
A separator is a horizontal or, the vertical line separating the UI elements of an application. In JavaFX the javafx.scene.control.Separator class represents a separator, to create a separator you need to instantiate this class.
Adding separator to the choice box
The choice box has an ObservableList which holds the list of choices. You can the choices to this list using add() or addAll() method as −
choiceBox.getItems().add(item); or, choiceBox.getItems().addAll(item1, item2, item3);
You can add the separator to the choice box using the add() or addAll() method. One of the add() method variants allows you to specify the index at which you need to add the item in the list of choices.
Example
import javafx.application.Application;
import javafx.collections.ObservableList;
import javafx.geometry.HPos;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.ChoiceBox;
import javafx.scene.control.Label;
import javafx.scene.control.Separator;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.scene.text.FontPosture;
import javafx.scene.text.FontWeight;
import javafx.stage.Stage;
public class ChoiceBoxAddingSeparator extends Application {
public void start(Stage stage) {
//Creating a choice box
ChoiceBox choiceBox = new ChoiceBox();
choiceBox.setValue("English");
//Retrieving the observable list
ObservableList list = choiceBox.getItems();
//Adding items to the list
list.add("English");
list.add("Hindi");
list.add("Telugu");
list.add("Tamil");
//Creating a separator
Separator sep = new Separator();
sep.setMaxWidth(80);
sep.setHalignment(HPos.CENTER);
//Adding separator to the choice box
list.add(2, sep);
//Setting the position of the choice box
choiceBox.setTranslateX(200);
choiceBox.setTranslateY(15);
Label label = new Label("Select Display Language:");
Font font = Font.font("verdana", FontWeight.BOLD, FontPosture.REGULAR, 12);
label.setFont(font);
label.setTranslateX(20);
label.setTranslateY(20);
//Adding the choice box to the group
Group root = new Group(choiceBox, label);
//Setting the stage
Scene scene = new Scene(root, 595, 170, Color.BEIGE);
stage.setTitle("Choice Box Example");
stage.setScene(scene);
stage.show();
}
public static void main(String args[]){
launch(args);
}
}Output
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