java JavaFX |窗格类

JavaFX |窗格类

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

窗格类是 JavaFX 的一部分。窗格类充当所有布局窗格的基类。基本上，它满足了公开子列表的需求，这样子类的用户就可以自由地添加/删除子列表。窗格类继承区域类。如果应用程序需要子级与父级保持一致，则必须使用 StackPane 。此类调整每个托管子级的大小，而不考虑子级的可见属性值。

该类的构造函数:

窗格():创建新的窗格对象。
窗格(节点… c) :用指定的节点创建新的窗格布局。

常用方法:

方法	说明
getChildren()	返回窗格的子级。
setLayoutX(双 v)	设置属性 layoutX 的值。
setlayouty(双 v)	设置属性 layoutY 的值。
getLayoutX()	返回属性 layoutX 的值。
getLayoutY()	返回属性 layoutY 的值。
设定尺寸(双倍宽度，双倍高度)	设置窗格的首选大小。
重新定位(双 x，双 y)	将对象重新定位到指定的坐标。

以下程序说明了窗格类的使用:

Java Program to create a Pane and add label to the Pane and add it to the stage: In this program we are creating a Pane named pane and a Label named label. Now add this label to the pane by passing it as an argument of the constructor of the pane. Then add the pane to the Scene and the scene to the stage. Call the show() function to display the final results.

```java // Java Program to create a Pane // and add label to the Pane // 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.layout.Pane; import javafx.scene.shape.*;

public class Pane_0 extends Application {

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

try {

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

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

// create a Pane             Pane pane = new Pane(label);

// create a scene             Scene scene = new Scene(pane, 400, 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 Pane and add labels and buttons to the pane and relocate them to specific positions and add it to the stage: In this program we will create a Pane named pane and a Label named label. Add this label to the pane by passing it as an argument of the constructor of the pane. Then create the five buttons and add them to the pane. Relocate the label and buttons to specified position using relocate() function. Add the pane to the Scene and add the scene to the stage. Call the show() function to display the final results.

```java // Java Program to create a Pane // and add labels and buttons to the pane // and relocate them to specific positions // 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.layout.Pane; import javafx.scene.shape.*;

public class Pane_1 extends Application {

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

try {

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

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

// relocate label             label.relocate(100, 10);

// create a Pane             Pane pane = new Pane(label);

// add buttons             for (int i = 0; i < 5; i++) {

// create button                 Button button = new Button("Button " + (int)(i + 1));

// add button                 pane.getChildren().add(button);

// relocate button                 button.relocate(100, 50 + 40 * i);             }

// create a scene             Scene scene = new Scene(pane, 400, 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: