By associating Checkbox objects with a CheckboxGroup.

The Checkbox class in Java is used to create checkboxes, not radio buttons. In Java, if you want to create a radio button, you would typically use the RadioButton class, which is part of the JavaFX library.

Here’s a simple example of creating a radio button in JavaFX:

java

import javafx.application.Application;

import javafx.scene.Scene;

import javafx.scene.control.RadioButton;

import javafx.scene.control.ToggleGroup;

import javafx.scene.layout.VBox;

import javafx.stage.Stage;
public class RadioButtonExample extends Application {

    public static void main(String[] args) {

        launch(args);

    }
    @Override

    public void start(Stage primaryStage) {

        primaryStage.setTitle("Radio Button Example");
        ToggleGroup group = new ToggleGroup();
        RadioButton radioButton1 = new RadioButton("Option 1");

        radioButton1.setToggleGroup(group);
        RadioButton radioButton2 = new RadioButton("Option 2");

        radioButton2.setToggleGroup(group);
        VBox vbox = new VBox(radioButton1, radioButton2);
        Scene scene = new Scene(vbox, 300, 200);

        primaryStage.setScene(scene);

primaryStage.show(); } }

In this example, RadioButton objects are created and added to a ToggleGroup. A ToggleGroup ensures that only one radio button within the group can be selected at a time, providing the functionality of a radio button group.