Introduction to Kotlin GUI

Kotlin GUI contains the small standard library so we can use the same code for java script, JVM and native support. Most of the functionality which we are using in Kotlin Gui is coming from the existing java or java script libraries. Kotlin is wrapping this all the libraries which was written in kotlin scratch. It can find the library framework which we are using into kotlin GUI.

Key Takeaways

• Jmenu in kotlin GUI is used to implement the menu which contains the popup window for menu items, which was used to display when user will select item from menu bar.
• We can create application window by using Jframe, also we can use jbutton, jlabel in kotlin GUI.

What is Kotlin GUI?

The swing and AWT is not different GUI toolkits the swing is implemented onto the top of AWT. The native widgets which was implemented into the java which was not relevant and not constituting the toolkit which was separate. Kotlin GUI is not the obsolete GUI tool it is the toolkit of the JRE. Using swing we are creating the GUI applications in kotlin. In kotlin the swing is the principal GUI toolkit for the programming language of java and kotlin. It contains the part of the JFC which was providing API for the graphical user interface for the programmer.

Kotlin GUI Application

Below application shows kotlin GUI as follows:

At the time of creating the GUI application first we are creating the project name as kotlin_GUI.

Below steps shows how to create the kotlin GUI application as follows:

1. In first step we are creating the project name as Kotlin_GUI by using Intellij idea we are providing below parameter while creating the kotlin project as follows. Also we are adding sample code.

Name – kotlin_GUI
location – \Documents
Language – Kotlin
Build system – Intellij
Jdk – Java version 11
Project – New project

2. After creating the new project template in this step we are checking the project structure of newly created project as follows.

3. After creating the project structure in below example we are displaying the simple window on screen. After running below code it will be opening below sample GUI as follows.

Code:

class simple (app_title: String) : Jframe () {
   init {
   createUI (app_title)
   }
   private fun createUI (app_title: String) {
   setTitle (app_title)
   defaultCloseOperation = JFrame.EXIT_ON_CLOSE
   setSize (350, 250)
   setLocationRelativeTo(null)
   }
}
  private fun createAndShowGUI () {
  val gui = KotlinGUIEx ("Simple")
gui.isVisible = true
}
fun main() {
  EventQueue.invokeLater (::createAndShowGUI)
}

Output:

4. After creating the sample GUI in this step we are creating the class for the menu option. Below example to implement the GUI of menu item as follows.

Code:

class Menu (app_title: String) : JFrame() {
   init {
   createUI (app_title)
   }
   private fun createUI (app_title: String) {
   setTitle (app_title)
   createMenuBar ()
   defaultCloseOperation = JFrame.EXIT_ON_CLOSE
   setSize (350, 250)
   setLocationRelativeTo(null)
   }
   private fun createMenuBar () {
   val menu_gui = JMenuBar ()
   val icon = ImageIcon ("\Documents\menu.png")
   val menu = Jmenu ("App File")
   menu.mnemonic = KeyEvent.VK_F
   val kotlinmenu = JMenuItem ("Exit", icon)
   kotlinmenu.mnemonic = KeyEvent.VK_E
   kotlinmenu.toolTipText = "Exit"
   kotlinmenu.addActionListener { _: ActionEvent -> System.exit(0) }
   file.add (eMenuItem)
   menu_gui.add (file)
   jMenuBar = menu_gui
   }
}
private fun createAndShowGUI() {
  val kotlin = KotlinSwingSimpleMenuExEx ("Simple menu")
  kotlin.isVisible = true
}
fun main() {
  EventQueue.invokeLater(::createAndShowGUI)
}

Output:

Top Kotlin GUI Project

Below is the top kotlin GUI project as follows. This project is using the kotlin GUI at the time of implementing the project.

• Compose-jb – This gui project is the multiplatform which contains the modern framework for kotlin which makes beautiful and user performance interface which was easy to managed by user. This kotlin GUI project will mention the GUI framework of the kotlin.
• Jclasslib – This is the byte code editor project which was designed by using the kotlin GUI. Jclasslib is the byte code editor tool which was visualizing all the aspects for the java class which was compiled and contains the byte code. Jclasslib project is very important for the byte code editor.
• Appwrite – The firebase of open source introduces the support of IOS. Appwrite is an open source backend server which helps us to build native application of IOS faster than API of realtime for authenticating file storage, database and cloud function. Appwrite is the very useful and important project of kotlin GUI.
• Kotlin libui – This project contains the portable GUI library which was defined for the kotlin GUI. It is very useful while developing the GUI application into the kotlin. We are defining this project into the kotlin GUI.
• Imgui – This project contains the boat free immediate mode of the graphical user interface for the java virtual machines with the minimal dependencies. This project is basically used to develop the image based application or project.
• Decompiler – This contains the GUI of java decompiler. This project is basically used to decompile the java code. It is providing good GUI in kotlin program to define the kotlin GUI application. Decompiler project is very useful in kotlin GUI.
• Installation – It will create the cross platform installer of the java applications by using the graphical user interface. This project of kotlin GUI will contain the installer of the cross platform.
• SonarLint – It clean code will begin with the sonar lint of our IDE. By using this project we can discover issues early. Sonar lint is the free plugin which helps us to find and fix the bugs and issues of security from the moment when we are writing the code. We can install the same from our favourite IDE. This kotlin gui project is very important.
• Scout APM – This project contains the less time debugging and contains building more time. Scout APM is used to fix and find the performance issue with the no hassle. By using the monitoring and external service, scout APM is the best tool at the time of developing any application.
• Projector client – This is the common and client related code for the running application of swing remotely. It is very useful tool at the time of developing GUI application into the kotlin.

Kotlin GUI FAQ

Given below are the kotlin GUI FAQ:

Q1. In which tool we can create kotlin GUI project?

Answer:

We can implement the GUI project by using the Intellij IDEA or any tool which was supporting for development of kotlin GUI.

Q2. Can we use jbutton in kotlin GUI?

Answer:

We are using button component of jbutton to develop the GUI application in kotlin or any application.

Q3. Can we use jlabel in Kotlin GUI?

Answer:

We are using component of jlabel to develop the GUI application in kotlin or any application.

Conclusion

The swing and AWT is not different GUI toolkits the swing is implemented onto the top of AWT. It contains the small standard library so we can use the same code for java script, JVM and native support.

Recommended Articles

This is a guide to Kotlin GUI. Here we discuss the introduction, application, top kotlin GUI project and FAQ respectively. You may also have a look at the following articles to learn more –

1. Kotlin Web Framework
2. Kotlin Internal
3. Kotlin print
4. Kotlin Queue

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