How to set application installer icon in JavaFX?

There is a open pull request documenting this here

It says:

Customize Icons

To customize the icons used in a native bundle, you have to provide the icons for the appropriate bundle. The icons must follow the file name convention in order to get picked up.

Tip: Set the verbose setting to true, to have log which files are picked up from your deploy directory.

and for Microsoft Windows in particular:

Windows

Icon location: src/main/deploy/windows

For Windows you can provide two different icons.

• application icon
• setup icon - the icon of the installer

| Type | Filename | | :---------------- |:------------------------- | | .exe icon | \<appName>.ico | | setup exe icon | \<appName>-setup-icon.bmp |

Despite what it says there, the correct path is src/main/deploy/packages/windows as show in the adjusted-launcher-icon example.

Maybe the path of your image ("/isotype.png") is incorrect. Choose one method to give correct path from below options. If icon image is stored:

• In a folder (e.g. images) then use this path "/images/isotype.png" as like:

  stage.getIcons().add(
        new Image(this.getClass().getResourceAsStream("/images/isotype.png")));
  

• In package directory then use this path "isotype.png" as like:

  stage.getIcons().add(new Image(this.getClass().getResourceAsStream("isotype.png")));
  

• In a folder structure then use this path "../images/isotype.png" as like:

  stage.getIcons().add(
        new Image(this.getClass().getResourceAsStream("../images/isotype.png"")));
  

---

Updated:

You have to take a look at A guide to the Gradle JavaFX Plugin which describes the Javafx packages are complete with cross-platform flair-like start menu integration, dock and tray icons, menu-bar integration, and single click icons. For that you've to Sign your files in the output folder if you plan to distribute the application, stated here in 7.3.5 using signtool.exe.

Now you have to some (icons) configuration options inside of the build.gradle as:

javafx {
    appID 'SampleApp'
    appName 'Sample Application'
    mainClass 'com.example.sample.Main'

    jvmArgs = ['-XX:+AggressiveOpts', '-XX:CompileThreshold=1']
    systemProperties = [ 'prism.disableRegionCaching':'true' ]
    arguments = ['-l', '--fast']

    embedLauncher = false

    // deploy/info attributes
    category = 'Demos'
    copyright = 'Copyright (c) 2013 Acme'
    description = 'This is a sample configuration, it is not real.'
    licenseType = 'Apache 2.0'
    vendor = 'Acme'
    installSystemWide = true
    menu = true
    shortcut = true

    // app icons
    icons {
        shortcut = ['shortcut-16.png', 'shortcut-32.png', 'shortcut-128.png', 'shortcut-256.png', '[email protected]', '[email protected]', '[email protected]']
        volume = 'javafx-icon.png'
        setup = 'javafx-icon.png'
    }

    // applet and webstart stuff
    debugKey {
        alias = 'debugKey'
        //keyPass = 'password' // provide via command line
        keyStore = file('~/keys/debug.jks')
        //storePass = 'password'  // provide via command line
    }
    releaseKey {
        alias = 'production'
        //keyPass = 'password' // provide via command line
        keyStore = file('/Volumes/ProdThumbDrive/production.jks')
        //storePass = 'password'  // provide via command line
    }
    signingMode 'release'

    width = 800
    height = 600
    embedJNLP = false
    codebase = 'http://example.com/bogus/JNLP/Codebase'

    // arbitrary jnlp icons
    icon {
        href = 'src/main/resources/javafx-icon.png'
        kind = 'splash'
        width = 128
        height = 128
    }
    icon {
        href = '[email protected]'
        kind = 'selected'
        width = 16
        height = 16
        scale = 1
    }
}