Update build.gradle

build.gradle : add the implementation groups for mac and linux

Adding these implementation group would allow different system base
to run my jar file.

Let's add all the relevant implementation group statments into
build.gradle.

Refer to this website on why is it done this way
https://se-education.org/guides/tutorials
/gradle.html#creating-a-jar-file

build.gradle

@@ -19,9 +19,17 @@ dependencies {
     String javaFxVersion = '11'
 
     implementation group: 'org.openjfx', name: 'javafx-base', version: javaFxVersion, classifier: 'win'
+    implementation group: 'org.openjfx', name: 'javafx-base', version: javaFxVersion, classifier: 'mac'
+    implementation group: 'org.openjfx', name: 'javafx-base', version: javaFxVersion, classifier: 'linux'
     implementation group: 'org.openjfx', name: 'javafx-controls', version: javaFxVersion, classifier: 'win'
+    implementation group: 'org.openjfx', name: 'javafx-controls', version: javaFxVersion, classifier: 'mac'
+    implementation group: 'org.openjfx', name: 'javafx-controls', version: javaFxVersion, classifier: 'linux'
     implementation group: 'org.openjfx', name: 'javafx-fxml', version: javaFxVersion, classifier: 'win'
+    implementation group: 'org.openjfx', name: 'javafx-fxml', version: javaFxVersion, classifier: 'mac'
+    implementation group: 'org.openjfx', name: 'javafx-fxml', version: javaFxVersion, classifier: 'linux'
     implementation group: 'org.openjfx', name: 'javafx-graphics', version: javaFxVersion, classifier: 'win'
+    implementation group: 'org.openjfx', name: 'javafx-graphics', version: javaFxVersion, classifier: 'mac'
+    implementation group: 'org.openjfx', name: 'javafx-graphics', version: javaFxVersion, classifier: 'linux'
 
     testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-api', version: '5.5.0'
     testRuntimeOnly group: 'org.junit.jupiter', name: 'junit-jupiter-engine', version: '5.5.0'

src/main/java/duke/main/Launcher.java

@@ -6,6 +6,11 @@
  * A launcher class to workaround classpath issues.
  */
 public class Launcher {
+
+    /**
+     * Main method to launch the application.
+     * @param args arguments used for the launch of application.
+     */
     public static void main(String[] args) {
         Application.launch(Main.class, args);
     }