IconsDemo: Make it possible to execute from the root project/reactor

    mvn package -DskipTests exec:java@demo
    mvn package -DskipTests exec:java@demo -Dexec.args=write_obj

See also:

-   Plugin Goal Invocation from Command Line
    <https://maven.apache.org/docs/3.3.1/release-notes.html#plugin-goal-invocation-from-command-line>
-   mojohaus/exec-maven-plugin#335

pom.xml

@@ -219,6 +219,16 @@
                     <groupId>org.codehaus.mojo</groupId>
                     <artifactId>exec-maven-plugin</artifactId>
                     <version>3.1.1</version>
+                    <executions>
+                        <execution>
+                            <id>demo</id>
+                            <configuration>
+                                <skip>true</skip>
+                                <!-- XXX: Required even with skipped executions -->
+                                <mainClass>dummy</mainClass>
+                            </configuration>
+                        </execution>
+                    </executions>
                 </plugin>
             </plugins>
         </pluginManagement>

xbrz-awt/pom.xml

@@ -19,6 +19,7 @@
         <module.name>io.github.stanio.xbrz.awt</module.name>
         <maven.install.skip>false</maven.install.skip>
         <maven.deploy.skip>false</maven.deploy.skip>
+        <exec.mainClass>io.github.stanio.xbrz.awt.demo.IconsDemo</exec.mainClass>
     </properties>
 
     <dependencies>
@@ -46,12 +47,13 @@
                 <artifactId>exec-maven-plugin</artifactId>
                 <executions>
                     <execution>
-                        <id>default-cli</id>
+                        <id>demo</id>
                         <goals>
                             <goal>java</goal>
                         </goals>
                         <configuration>
-                            <mainClass>io.github.stanio.xbrz.awt.demo.IconsDemo</mainClass>
+                            <skip>false</skip>
+                            <mainClass>${exec.mainClass}</mainClass>
                             <classpathScope>test</classpathScope>
                             <additionalClasspathElements>
                                 <additionalClasspathElement>${project.build.outputDirectory}/META-INF/versions/9</additionalClasspathElement>

xbrz-awt/src/test/java/io/github/stanio/xbrz/awt/demo/IconsDemo.java

@@ -42,6 +42,10 @@
 public class IconsDemo extends JFrame {
 
     public IconsDemo() {
+        this("editbookmarks2");
+    }
+
+    public IconsDemo(String iconName) {
         super("Icon Scaling");
         super.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
         super.getRootPane().getActionMap().put("exit", new AbstractAction() {
@@ -52,15 +56,14 @@ public IconsDemo() {
         });
         super.getRootPane().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW)
                            .put(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0, false), "exit");
-        initUI();
+        initUI(iconName);
     }
 
     private static Image loadImage(String name) {
         return new ImageIcon(IconsDemo.class.getResource(name)).getImage();
     }
 
-    private void initUI() {
-        final String imageName = "editbookmarks2";
+    private void initUI(String imageName) {
         Image loresImage = loadImage(imageName + "-16.png");
         Image hiresImage = loadImage(imageName + "-32.png");
 
@@ -192,13 +195,14 @@ private static BufferedImage scaleImage(Image image,
      * @param   args  <i>unused</i>
      */
     public static void main(String[] args) {
+        final String iconName = (args.length == 1) ? args[0] : "editbookmarks2";
         SwingUtilities.invokeLater(() -> {
             try {
                 javax.swing.UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel");
             } catch (Exception e) {
                 System.err.println(e);
             }
-            IconsDemo frame = new IconsDemo();
+            IconsDemo frame = new IconsDemo(iconName);
             frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
             frame.pack();
             frame.setLocationRelativeTo(null);