JavaFX | StackPane Class

StackPane class is a part of JavaFX. StackPane class lays out its children in form of a stack. The new node is placed on the top of the previous node in a StackPane. StackPane class inherits Pane Class.

Constructors of the class:

1. StackPane(): Creates a new empty StackPane.
2. StackPane(Node… c): Creates a new StackPne with specified nodes.

Commonly Used Methods:

Method	Explanation
getAlignment()	Returns the alignment of the StackPane.
getAlignment(Node c)	Returns the node’s alignment.
getMargin(Node c)	Returns the insets of the node.
setAlignment(Node n, Pos v)	Sets the alignment of the node which is a part of StackPane.
setAlignment(Pos v)	Sets the alignment of the StackPane.
setMargin(Node n, Insets v)	Sets the margin of the node which is a part of StackPane.

Below programs illustrate the use of StackPane Class:

1. Java Program to create a StackPane, add circle, label, rectangle and add it to the stage: In this program we are creating a Label named label, a Rectangle named rectangle and a Circle named circle. Then set the font of the StackPane using the setFont() function. Now set the fill of the rectangle and circle using the setFill() function. We will then create a StackPane named stack_pane and add rectangle, circle and label. Create a scene and add the stack_pane to the scene. Add this scene to the stage and call the show() function to display the final results.

   // Java Program to create a StackPane,
   // add circle, label, rectangle
   // 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.scene.paint.*;
   import javafx.scene.canvas.*;
   import javafx.scene.text.*;
   import javafx.scene.Group;
   import javafx.scene.shape.*;
   
   public class StackPane_1 extends Application {
   
       // launch the application
       public void start(Stage stage)
       {
   
           try {
   
               // set title for the stage
               stage.setTitle("StackPane");
   
               // create a label
               Label label = new Label("this is StackPane example");
   
               // set Font for label
               label.setFont(new Font(30));
   
               // create a circle
               Circle circle = new Circle(100, 100, 70);
   
               // set fill for  the circle
               circle.setFill(Color.RED);
   
               // create Rectangle
               Rectangle rectangle = new Rectangle(100, 100, 180, 160);
   
               // set fill for rectangle
               rectangle.setFill(Color.BLUE);
   
               // create a stack pane
               StackPane stack_pane = new StackPane(rectangle, circle, label);
   
               // create a scene
               Scene scene = new Scene(stack_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);
       }
   }

   Output:

   

2. Java Program to create a StackPane, add the circle, label, rectangle and then set the alignment of the StackPane and add it to the stage: In this program we are creating a Label named label, a Rectangle named rectangle and a Circle named circle. Then set the font of the StackPane using the setFont() function. Set fill of the rectangle and circle using the setFill() function. Now create a StackPane named stack_pane and add rectangle, circle, and label. Set the alignment of the stack_pane using setAlignment() function. Create a scene and add the stack_pane to the scene. Finally add this scene to the stage and call the show() function to display the results.

   // Java Program to create a StackPane,
   // add the circle, label, rectangle and
   // then set the alignment of the StackPane
   // 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.geometry.*;
   import javafx.scene.paint.*;
   import javafx.scene.canvas.*;
   import javafx.scene.text.*;
   import javafx.scene.Group;
   import javafx.scene.shape.*;
   
   public class StackPane_2 extends Application {
   
       // launch the application
       public void start(Stage stage)
       {
   
           try {
   
               // set title for the stage
               stage.setTitle("StackPane");
   
               // create a label
               Label label = new Label("this is StackPane example");
   
               // set Font for label
               label.setFont(new Font(30));
   
               // create a circle
               Circle circle = new Circle(100, 100, 70);
   
               // set fill for  the circle
               circle.setFill(Color.RED);
   
               // create Rectangle
               Rectangle rectangle = new Rectangle(100, 100, 180, 160);
   
               // set fill for rectangle
               rectangle.setFill(Color.BLUE);
   
               // create a stack pane
               StackPane stack_pane = new StackPane(rectangle, circle, label);
   
               // set alignement for the stack pane
               stack_pane.setAlignment(Pos.TOP_CENTER);
   
               // create a scene
               Scene scene = new Scene(stack_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);
       }
   }

   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/StackPane.html