I know it is possible to create a project to run a single application class using org.openjfx.javafxplugin like so:

plugins {
    id 'java'
    id 'application'
    id 'org.openjfx.javafxplugin' version '0.1.0'
}

javafx {
    version = '22.0.1'
    modules = [ 'javafx.controls', 'javafx.fxml', 'javafx.web', 'javafx.swing' ]
}

application {
    mainClass = 'my.App'
}

It configures the :run task properly and adds JavaFX dependencies.

But I need to create a few tasks to run different classes. runAppA, runAppB, etc. How do I do that?

Declaring a JavaExec task like so does not help:

tasks.register('runAppA', JavaExec) {
    group = 'application'
    classpath = sourceSets.main.runtimeClasspath
    mainClass = 'runAppA'

    jvmArgs = [
        '--module-path', configurations.implementation.runtimeClasspath.asPath,
        '--add-modules', 'javafx.controls,javafx.fxml,javafx.web,javafx.swing'
    ]
}

It gives me an error Could not get unknown property ‘runtimeClasspath’ for configuration ‘:component-demos:implementation’ of type org.gradle.api.internal.artifacts.configurations.DefaultUnlockedConfiguration.

How do I properly configure it?