Step by Step solution about How to resolve the algorithm Hello world/Graphical step by step in the Kotlin programming language

This Kotlin code is a graphical user interface (GUI) program that displays a message in an alert box, a title bar, a button, and an editable text area.

1. Java AWT and Swing Libraries:

• The code imports the java.awt and javax.swing packages, which provide classes for creating GUI components.

2. Main Function:

• The main function is the program's entry point.

3. JOptionPane:

• JOptionPane.showMessageDialog(null, "Goodbye, World!") displays an alert box with the message "Goodbye, World!".

4. JFrame:

• with(JFrame("Goodbye, World!")) {} creates a JFrame window with the title "Goodbye, World!".
• The with block applies a series of configurations to the JFrame.

5. GUI Components:

• add(JButton("Goodbye, World!")) adds a button with the text "Goodbye, World!" to the JFrame.
• add(JTextArea("Goodbye, World!")) adds an editable text area with the text "Goodbye, World!" to the JFrame.

6. JFrame Configuration:

• layout = FlowLayout() sets the layout manager for the JFrame to FlowLayout, which arranges components horizontally.
• pack() adjusts the size of the JFrame to fit its contents.
• defaultCloseOperation = JFrame.EXIT_ON_CLOSE specifies that the program should end when the JFrame is closed.
• isVisible = true makes the JFrame visible.

Program Flow:

1. The program displays an alert box with the message "Goodbye, World!".
2. A JFrame window is created with the title "Goodbye, World!" and a FlowLayout.
3. A button with the text "Goodbye, World!" and a text area with the text "Goodbye, World!" are added to the JFrame.
4. The JFrame is resized to fit its contents and displayed on the screen.
5. When the JFrame is closed, the program terminates.

import java.awt.*
import javax.swing.*

fun main(args: Array<String>) {
    JOptionPane.showMessageDialog(null, "Goodbye, World!") // in alert box
    with(JFrame("Goodbye, World!")) {                      // on title bar
        layout = FlowLayout()
        add(JButton("Goodbye, World!"))                    // on button
        add(JTextArea("Goodbye, World!"))                  // in editable area
        pack()
        defaultCloseOperation = JFrame.EXIT_ON_CLOSE
        isVisible = true
    }
}