Chapter 16, Problem 16.1PE

Program Plan Intro

Program Plan:

• Include the required import statement.
• Define the main class.
  • Declare the necessary variables
  • Using start initialize the required.
    • Create the border pane, radio button, text field, toggle group and button.
    • Set everything into the panel.
    • Add the actions event to the button.
    • Create a scene and place the pane in the stage.
    • Set the title.
    • Place the scene in the stage.
    • Display the stage.
  • Define the main method using public static main.
    • Initialize the call.

Program Description Answer

The below program will display the statement in different colors and move the statement left and right using GUI as follows:

Explanation of Solution

Program:

//import statement

import javafx.application.Application;

import javafx.geometry.Pos;

import javafx.scene.Scene;

import javafx.scene.control.Button;

import javafx.scene.control.RadioButton;

import javafx.scene.control.ToggleGroup;

import javafx.scene.layout.BorderPane;

import javafx.scene.layout.HBox;

import javafx.scene.layout.Pane;

import javafx.scene.paint.Color;

import javafx.scene.text.Font;

import javafx.scene.text.Text;

import javafx.stage.Stage;

//definition of "Test" class

public class Test extends Application

{

//declare the required variables

private double pane_width = 500;

private double pane_height = 150;

@Override

/*start method gets overridden in the application class*/

public void start(Stage pri_stage)

{

//create a text

Text t = new Text(20, 40, "Programming is fun");

//set the font

t.setFont(new Font("Times", 20));

//create a text

Pane p = new Pane();

//create a label

p.getChildren().add(t);

//set the style

p.setStyle("-fx-border-color: gray");

//create a radio buttons

RadioButton r_red = new RadioButton("Red");

RadioButton r_yellow = new RadioButton("Yellow");

RadioButton r_black = new RadioButton("Black");

RadioButton r_orange = new RadioButton("Orange");

RadioButton r_green = new RadioButton("Green");

//create a toggle group

ToggleGroup group = new ToggleGroup();

//set the toggle groups

r_red.setToggleGroup(group);

r_yellow.setToggleGroup(group);

r_black.setToggleGroup(group);

r_black.setSelected(true);

r_orange.setToggleGroup(group);

r_green.setToggleGroup(group);

//create a box

HBox h_box = new HBox(5);

//create a label

h_box.getChildren().addAll(r_red, r_yellow, r_black, r_orange, r_green);

//set the alignment

h_box.setAlignment(Pos.CENTER);

//create a button

Button bt_left = new Button("<=");

Button bt_right = new Button("=>");

//create a box for button

HBox h_boxForButtons = new HBox(5);

//create a label

h_boxForButtons.getChildren().addAll(bt_left, bt_right);

//set the alignment

h_boxForButtons.setAlignment(Pos.CENTER);

//create a border pane

BorderPane border_pane = new BorderPane();

//set the border pane

border_pane.setTop(h_box);

border_pane.setCenter(p);

border_pane.setBottom(h_boxForButtons);

// create a scene and place it in the stage

Scene scene = new Scene(border_pane, pane_width, pane_height + 40);

//set the stage title

pri_stage.setTitle("Exercise16_01");

//place the scene in the stage

pri_stage.setScene(scene);

//display the stage

pri_stage.show();

// action event for the buttons gets created

r_red.setOnAction(e->t.setStroke(Color.RED));

r_yellow.setOnAction(e->t.setStroke(Color.YELLOW));

r_black.setOnAction(e->t.setStroke(Color.BLACK));

r_orange.setOnAction(e->t.setStroke(Color.ORANGE));

r_green.setOnAction(e->t.setStroke(Color.GREEN));

bt_left.setOnAction(e->t.setX(t.getX() - 1));

bt_right.setOnAction(e->t.setX(t.getX() + 1));

}

//definition of main method

public static void main(String[] args)

{

//initilaize calls

launch(args);

}

}

Sample Output