JavaFX | Класс VBox

VBox является частью JavaFX. VBox размещает своих дочерних элементов в виде вертикальных столбцов. Если для vbox установлены границы и / или отступы, то содержимое будет размещено внутри этих вставок. Класс VBox расширяет класс Pane .

Конструктор класса:

1. VBox () : создает макет VBox с интервалом = 0 и выравниванием по TOP_LEFT.
2. VBox (double s) : создает новый VBox с указанным интервалом между дочерними элементами.
3. VBox (double s, Node… c) : создает новый VBox с указанными узлами и промежутками между ними.
4. VBox (Узел… c) : создает макет VBox с интервалом = 0.

Часто используемые методы:

Below programs illustrate the use of VBox class:

1. Java Program to create a VBox and add it to the stage: In this program we will create a VBox named vbox. We will create a label and add it to the vbox. We will also create some buttons and add them to the VBox using the getChildren().add() function. Now create a scene and add the vbox to the scene and add the scene to the stage and call show() function to display the final results.

   // Java Program to create a VBox  // and add it to the stage import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.*; import javafx.scene.layout.*; import javafx.stage.Stage; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.scene.canvas.*; import javafx.scene.web.*; import javafx.scene.Group;    public class VBOX_1 extends Application {        // launch the application     public void start(Stage stage)     {            try {                // set title for the stage             stage.setTitle("VBox");                // create a VBox             VBox vbox = new VBox();                // create a label             Label label = new Label("this is VBox example");                // add label to vbox             vbox.getChildren().add(label);                // add buttons to VBox             for (int i = 0; i < 10; i++)             {                 vbox.getChildren().add(new Button("Button " + (int)(i + 1)));             }                // create a scene             Scene scene = new Scene(vbox, 300, 300);                // set the scene             stage.setScene(scene);                stage.show();         }            catch (Exception e) {                System.out.println(e.getMessage());         }     }        // Main Method     public static void main(String args[])     {            // launch the application         launch(args);     } }

   Output:
   

2. Java Program to create a VBox, add spaces between its elements and add it to the stage: In this program we will create a VBox named vbox. We will set the spacing by passing a double value of space as an argument to the constructor. Now create a label and add it to the vbox. To add some buttons to the VBox use the getChildren().add() function. Finally, create a scene and add the vbox to the scene and add the scene to the stage and call show() function to display the final results.

   // Java Program to create a VBox, add  // spaces between its elements and add // it to the stage import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.*; import javafx.scene.layout.*; import javafx.stage.Stage; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.scene.canvas.*; import javafx.scene.web.*; import javafx.scene.Group;    public class VBOX_2 extends Application {        // launch the application     public void start(Stage stage)     {            try {                // set title for the stage             stage.setTitle("VBox");                // create a VBox             VBox vbox = new VBox(10);                // create a label             Label label = new Label("this is VBox example");                // add label to vbox             vbox.getChildren().add(label);                // add buttons to VBox             for (int i = 0; i < 5; i++)             {                 vbox.getChildren().add(new Button("Button " + (int)(i + 1)));             }                // create a scene             Scene scene = new Scene(vbox, 300, 300);                // set the scene             stage.setScene(scene);                stage.show();         }            catch (Exception e) {                System.out.println(e.getMessage());         }     }        // Main Method     public static void main(String args[])     {            // launch the application         launch(args);     } }

   Output:

   

3. Java Program to create a VBox, add spaces between its elements, set an alignment and add it to the stage: In this program we will create a VBox named vbox. We will set the spacing by passing a double value of space as an argument to the constructor. Set the alignment of the VBox using the setAlignment() function. Then create a label and add it to the vbox. Add some buttons to the VBox using the getChildren().add() function. Finally, create a scene and add the vbox to the scene and add the scene to the stage and call show() function to display the final results.

   // Java Program to create a VBox, add spaces // between its elements, set an alignment  // and add it to the stage import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.*; import javafx.scene.layout.*; import javafx.stage.Stage; import javafx.event.ActionEvent; import javafx.event.EventHandler; import javafx.scene.Group; import javafx.geometry.Pos;    public class VBOX_3 extends Application {        // launch the application     public void start(Stage stage)     {            try {                // set title for the stage             stage.setTitle("VBox");                // create a VBox             VBox vbox = new VBox(10);                // create a label             Label label = new Label("this is VBox example");                // add label to vbox             vbox.getChildren().add(label);                // set alignment             vbox.setAlignment(Pos.CENTER);                // add buttons to VBox             for (int i = 0; i < 5; i++)             {                 vbox.getChildren().add(new Button("Button " + (int)(i + 1)));             }                // create a scene             Scene scene = new Scene(vbox, 300, 300);                // set the scene             stage.setScene(scene);                stage.show();         }            catch (Exception e) {                System.out.println(e.getMessage());         }     }        // Main Method     public static void main(String args[])     {            // launch the application         launch(args);     } }

   Output:

   

Note: The above programs might not run in an online IDE please use an offline compiler.

Reference: https://docs.oracle.com/javase/8/javafx/api/javafx/scene/layout/VBox.html

Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. To complete your preparation from learning a language to DS Algo and many more,  please refer Complete Interview Preparation Course.