Version check

build.xml

<!-- Minimal ant build file for VersionCheck -->
<!-- https://stackoverflow.com/q/71131137/230513 -->

<project name="VersionCheck" default="default" basedir=".">

<!-- set global properties for this build -->
<property name="proj" value="VersionCheck"/>
<property name="main" value="VersionCheck"/>
<property name="srcDir" value="."/>
<property name="buildDir" value="."/>
<property name="distDir" value="."/>
<property name="jversion" value="17"/>
<property name="version" value="1.0.0"/>
<property name="modulePath" value="/Users/Shared/javafx-sdk-17.0.6/lib"/>
<property name="modules" value="ALL-MODULE-PATH"/>

<!-- Initialize -->
<target name="init" description="Initialize the build process.">
    <!-- Create a time stamp -->
    <tstamp/>
</target>

<!-- Compile source files to class files -->
<target name="compile" depends="init" description="Compile the program.">
    <mkdir dir="${buildDir}"/>
    <javac srcDir="${srcDir}" destDir="${buildDir}" includeantruntime="false"
        debug="on" source="${jversion}" target="${jversion}">
        <compilerarg line="--module-path ${modulePath}"/>
        <compilerarg line="--add-modules ${modules}"/>
    </javac>
</target>

<!-- Build jar from classes -->
<target name="jar" depends="compile" description="Build a jar file.">
    <jar destfile="${distDir}/${proj}.jar">
        <manifest>
            <attribute name="Main-Class" value="${main}"/>
        </manifest>
        <fileset file="build.xml"/>
        <fileset file="${srcDir}/${main}.java"/>
        <fileset file="${buildDir}/${main}.class"/>
    </jar>
</target>

<!-- Run the program -->
<target name="run" depends="jar" description="Run the program.">
    <java jar="${distDir}/${proj}.jar" fork="true">
        <jvmarg line="--module-path ${modulePath}"/>
        <jvmarg line="--add-modules ${modules}"/>
    </java>
</target>

<!-- Run the program -->
<target name="test" depends="run" description="Test the program.">
    <java jar="${distDir}/${proj}.jar" fork="true">
        <arg line="${proj}.jar"/>
    </java> 
</target>

<!-- Clean up all build/dist/temp directories -->
<target name="clean" description="Clean the project.">
    <delete dir="${buildDir}" includes="**/*.class"/>
    <delete dir="${distDir}" includes="*.jar"/>
</target>

<!-- Default target -->
<target name="default" depends="clean, jar" description="Default clean and build.">
</target>

</project>

run.sh

#!/bin/sh
JFX="--module-path /Users/Shared/javafx-sdk-17.0.6/lib --add-modules ALL-MODULE-PATH"
javac $JFX *.java && java $JFX VersionCheck

VersionCheck.java

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

/**
 * @see https://stackoverflow.com/q/11266997/230513
 */
public class VersionCheck extends Application {

    @Override
    public void start(Stage stage) {
        stage.setTitle("VersionCheck");
        BorderPane root = new BorderPane();
        root.setBottom(createVersion());
        stage.setScene(new Scene(root));
        stage.show();
    }

    private Label createVersion() {
        Label label = new Label(
            System.getProperty("os.name")
            + " v" + System.getProperty("os.version")
            + "; Java v" + System.getProperty("java.version")
            + "; JavaFX v" + System.getProperty("javafx.runtime.version"));
        label.setPadding(new Insets(8));
        return label;
    }

    public static void main(String[] args) {
        launch(args);
    }
}