JavaFX: CheckBox

 

CheckBox is used to define check box control.

 

CheckBox states

CheckBox control has three states.

a.   Checked: Indeterminate property is false and selected property is true.

b.   Unchecked: Indeterminate property is false and selected property is false.

c.    Undefined: Indeterminate property is true. Undefined or indeterminate state of the CheckBox is rendered with a minus or dash sign.

 

CheckBox class provides following  constructors to define CheckBox instance.

 

public CheckBox()

public CheckBox(String text)

'text' specifies a text string for its label.

 

Find the below working application.

 

checkBoxDemo.fxml

<?import javafx.scene.*?>
<?import javafx.scene.shape.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.text.*?>
<?import javafx.scene.effect.*?>
<?import javafx.scene.control.*?>

<VBox xmlns:fx="http://javafx.com/fxml" fx:controller="com.sample.app.widgets.controller.CheckBoxController"
    fx:id="vBox1" spacing="20" alignment="center">
    
    <HBox fx:id="lableHBox"> 
        <Label fx:id="title" text="Select the vegetables" wrapText="true"/>
    </HBox>
    
    <HBox fx:id="vegetableChooserHBox">
        <VBox>
            <CheckBox fx:id="broccoli" text="broccoli"/>
            <CheckBox fx:id="corn" text="corn"/>
            <CheckBox fx:id="cucumber" text="cucumber"/>
        </VBox>
        
        <VBox>
            <CheckBox fx:id="lettuce" text="lettuce"/>
            <CheckBox fx:id="pumpkin" text="pumpkin"/>
            <CheckBox fx:id="pumpkin" text="pumpkin"/>
        </VBox>
        
        <VBox>
            <CheckBox fx:id="beetroot" text="beetroot"/>
            <CheckBox fx:id="sprouts" text="sprouts"/>
            <CheckBox fx:id="carrot" text="carrot"/>
        </VBox>
    </HBox>
    
    <HBox fx:id="lableHBox"> 
        <Label fx:id="selectedVegetables" text="" wrapText="true"/>
    </HBox>
    
    
</VBox>

 

CheckBoxController.java

package com.sample.app.widgets.controller;

import java.net.URL;
import java.util.*;

import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.geometry.Insets;
import javafx.scene.Node;
import javafx.scene.control.Label;
import javafx.scene.control.CheckBox;
import javafx.scene.effect.DropShadow;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.scene.text.FontPosture;

public class CheckBoxController implements Initializable {

    @FXML
    private VBox vBox1;

    @FXML
    private HBox vegetableChooserHBox;

    @FXML
    private Label selectedVegetables;

    @FXML
    private Label title;

    @Override
    public void initialize(URL location, ResourceBundle resources) {

        DropShadow dropShadow = new DropShadow();
        dropShadow.setOffsetX(5);
        dropShadow.setOffsetY(5);
        dropShadow.setColor(Color.GRAY);

        vBox1.setEffect(dropShadow);
        vBox1.setStyle("-fx-background-color:lightyellow");

        vegetableChooserHBox.setSpacing(10);
        vegetableChooserHBox.setPadding(new Insets(20, 20, 20, 80));

        Font font = Font.font("Verdana", FontPosture.REGULAR, 25);

        Iterator<Node> nodes = vegetableChooserHBox.getChildren().iterator();
        vegetableChooserHBox.setSpacing(10);
        List<CheckBox> checkBoxes = new ArrayList<>();

        while (nodes.hasNext()) {
            VBox vBox = (VBox) nodes.next();
            vBox.setSpacing(10);

            Iterator<Node> vBoxNodes = vBox.getChildren().iterator();

            while (vBoxNodes.hasNext()) {
                Node node = vBoxNodes.next();
                if (node instanceof CheckBox) {
                    CheckBox checkBox = (CheckBox) node;
                    checkBoxes.add(checkBox);

                    checkBox.setFont(font);

                    checkBox.setOnAction((event) -> {
                        StringJoiner stringJoiner = new StringJoiner(",");

                        for (CheckBox checkBoxTemp : checkBoxes) {
                            if (checkBoxTemp.isSelected()) {
                                stringJoiner.add(checkBoxTemp.getText());
                            }
                        }

                        String info = "Selected items are : " + stringJoiner.toString();
                        selectedVegetables.setText(info);

                    });

                }
            }

        }

        title.setFont(Font.font("Verdana", FontPosture.REGULAR, 50));
        title.setPadding(new Insets(20, 20, 20, 20));

        selectedVegetables.setFont(Font.font("Verdana", FontPosture.ITALIC, 25));
        selectedVegetables.setTextFill(Color.BLUE);
        selectedVegetables.setPadding(new Insets(20, 20, 20, 20));

    }
}

 

CheckBoxDemo.java

package com.sample.app.widgets;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class CheckBoxDemo extends Application {

    private static final String FXML_FILE = "/checkBoxDemo.fxml";
    private static final String STAGE_TITLE = "CheckBox Demo";

    public static void main(String args[]) {
        launch(args);

    }

    @Override
    public void start(Stage primaryStage) throws Exception {

        Parent root = (Parent) FXMLLoader.load(this.getClass().getResource(FXML_FILE));

        Scene scene = new Scene(root, 700, 600, Color.WHITE);

        primaryStage.setTitle(STAGE_TITLE);
        primaryStage.setScene(scene);
        primaryStage.show();

    }

}

 

Output

 

 
Select vegetables, you can see the selected items information in below of the window.

 

 

Previous                                                    Next                                                    Home