java JavaFX | HBox 类

JavaFX | HBox 类

原文:https://www.geeksforgeeks.org/javafx-hbox-class/

HBox 是 JavaFX 的一部分。HBox 以水平列的形式显示其子代。如果 HBox 设置了边框和/或填充，那么内容将在这些插页中显示。HBox 类扩展了窗格类。

类的构造函数:

HBox() :创建一个没有节点的 HBox 对象。
HBox(双 s) :创建节点之间有间距的 HBox。

常用方法:

方法	说明
getAlignment()	返回属性对齐的值。
getSpacing()	返回其子对象之间的间距。
设置对齐(位置值)	设置 HBox 的对齐方式。
getChildren()	返回 HBox 中的节点。

以下程序说明了 HBox 类的使用:

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

```java // Java Program to create a HBox // 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 HBOX_1 extends Application {

// launch the application     public void start(Stage stage)     {

try {

// set title for the stage             stage.setTitle("HBox");

// create a HBox             HBox hbox = new HBox();

// create a label             Label label = new Label("this is HBox example");

// add label to hbox             hbox.getChildren().add(label);

// add buttons to HBox             for (int i = 0; i < 10; i++)             {                 hbox.getChildren().add(new Button("Button "                                            + (int)(i + 1)));             }

// create a scene             Scene scene = new Scene(hbox, 800, 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);     } } ```

输出:
Java Program to create a HBox, add spaces between its elements and add it to the stage: In this program we will create a HBox named hbox. 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 hbox. To add some buttons to the HBox use the getChildren().add() function. Finally, create a scene and add the hbox to the scene and add the scene to the stage and call show() function to display the final results.

```java // Java Program to create a HBox, 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 HBOX_2 extends Application {

// launch the application     public void start(Stage stage)     {

try {

// set title for the stage             stage.setTitle("HBox");

// create a HBox             HBox hbox = new HBox(10);

// create a label             Label label = new Label("this is HBox example");

// add label to hbox             hbox.getChildren().add(label);

// add buttons to HBox             for (int i = 0; i < 5; i++)             {                 hbox.getChildren().add(new Button("Button "                                           + (int)(i + 1)));             }

// create a scene             Scene scene = new Scene(hbox, 800, 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);     } } ```

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

```java // Java Program to create a HBox, 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.canvas.; import javafx.scene.web.; import javafx.scene.Group; import javafx.geometry.*;

public class HBOX_3 extends Application {

// launch the application     public void start(Stage stage)     {

try {

// set title for the stage             stage.setTitle("HBox");

// create a HBox             HBox hbox = new HBox(10);

// setAlignment             hbox.setAlignment(Pos.CENTER);

// create a label             Label label = new Label("this is HBox example");

// add label to hbox             hbox.getChildren().add(label);

// add buttons to HBox             for (int i = 0; i < 5; i++)             {                 hbox.getChildren().add(new Button("Button "                                           + (int)(i + 1)));             }

// create a scene             Scene scene = new Scene(hbox, 800, 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);     } } ```

输出: