Chapter 15, Problem 2FE

Explanation of Solution

Given program:

//Include libraries

import javafx.fxml.FXML;

import javafx.scene.control.Button;

//Define class MyControlClass

public class MyControlClass

{

//Declare variable

private Button okButton;

//Declare variable

private Label outputLabel;

//Define method initialize()

public void initialize()

{

}

//Define method okButtonListener()

public void okButtonListener()

{

//Display text

outputLabel.text("Hello World!");

}

}

Controller class:

• The main application class is responsible for building scene graph and displaying GUI.
• The “controller” class is responsible for handling events that occurs while application is running.
• The items present in “controller” class includes:
  • The necessary “import” statements.
  • Private variables for referencing components with “fx:id” in scene graph.
  • An optional “initialize” method that is been called automatically after FXML file is loaded...