Chapter 14, Problem 14.1PE

Program Plan Intro

Program Plan:

• Import required packages.
• Declare a main class named “ch14_1” which extends the “Application” class.
  • Declare a “start ()” method which overrides the “start ()” method in the “Application” class. Inside this method,
    • Create a GridPane in order to display images.
    • Place the pane in center position using “setAlignment ()” method.
    • Set the horizontal and vertical gap for the pane using “setHgap ()” and “setVgap ()” functions respectively.
    • Create four ImageView objects to display all the images from the file.
    • Add all the four images on their respective position on the pane.
    • Create a scene and place it on the stage.
    • Set the title as “Exercise14_01”.
    • Display the stage on the window using “primaryStage.show()” method.
  • Declare a main method using “public static main”.
    • Launch the method using “launch ()” method.

Program Description Answer

The below program displays four images on the GridPane as per the given image.

Explanation of Solution

Program:

//Import required packages

import javafx.application.Application;

import javafx.geometry.Pos;

import javafx.scene.Scene;

import javafx.scene.layout.GridPane;

import javafx.stage.Stage;

import javafx.scene.image.ImageView;

//Main class extends Application

public class ch14_1 extends Application

{

//Overrides the start method in the application

@Override

//start method

public void start(Stage primaryStage)

{

//Create a GridPane to display images

GridPane GP = new GridPane();

//Place the pane in center position

GP.setAlignment(Pos.CENTER);

/*set the horizontal and vertical gap for the pane*/

GP.setHgap(5);

GP.setVgap(5);

/*Create 4 image views to display 4 images and pass the url from the file name*/

ImageView IV1 = new ImageView("snaps/germany.gif");

ImageView IV2 = new ImageView("snaps/china.gif");

ImageView IV3 = new ImageView("snaps/fr.gif");

ImageView IV4 = new ImageView("snaps/us.gif");

/*Add image to the pane in the first row, first column*/

GP.add(IV1, 0, 0);

/*Add image to the pane in the second row, first column*/

GP.add(IV2, 1, 0);

/*Add image to the pane in the first row, second column*/

GP.add(IV3, 0, 1);

/*Add image to the pane in the second row, second column*/

GP.add(IV4, 1, 1);

//Create a scene and place it on the stage

Scene scene = new Scene(GP);

//Setting title

primaryStage.setTitle("Exercise14_01");

//Place the scene on the stage

primaryStage.setScene(scene);

//Display the stage on the window

primaryStage.show();

}

//Main method

public static void main(String[] args)

{

//Launch the application

launch(args);

}

}

Sample Output

Screenshot of the output