Upgrade JavaFX to ver 17

The application uses JavaFX 11 which is reaching its EOL in September
2023. Thus it is better to upgrade JavaFX to the next LTS version which
is version 17.

However, after version 16, JavaFX now throws a warning when JavaFX
modules are loaded from the classpath. As there is currently no plan to
migrate to using Modules in AB3, let's include an additional log message
to inform the users to ignore the warning message.

build.gradle

@@ -42,7 +42,7 @@ task coverage(type: JacocoReport) {
 
 dependencies {
     String jUnitVersion = '5.4.0'
-    String javaFxVersion = '11.0.2'
+    String javaFxVersion = '17.0.7'
 
     implementation group: 'org.openjfx', name: 'javafx-base', version: javaFxVersion, classifier: 'win'
     implementation group: 'org.openjfx', name: 'javafx-base', version: javaFxVersion, classifier: 'mac'

src/main/java/seedu/address/Main.java

@@ -1,6 +1,9 @@
 package seedu.address;
 
+import java.util.logging.Logger;
+
 import javafx.application.Application;
+import seedu.address.commons.core.LogsCenter;
 
 /**
  * The main entry point to the application.
@@ -19,7 +22,20 @@
  * to be the entry point of the application, we avoid this issue.
  */
 public class Main {
+    private static Logger logger = LogsCenter.getLogger(Main.class);
+
     public static void main(String[] args) {
+        /*
+         * As per https://github.com/openjdk/jfx/blob/master/doc-files/release-notes-16.md
+         * JavaFX 16 (or later) runtime logs a warning at startup if JavaFX classes are loaded from
+         * the classpath instead of a module.
+         * Our application does not use Java modules yet. Even if it did, modules are ignored when
+         * packed into a FAT Jar file (as we do), which means this warning will persist even then.
+         * The warning however, can be safely ignored. Thus, the following log informs
+         * the user (if looking at the log output) that the said warning appearing in the log
+         * can be ignored.
+         */
+        logger.info("The warning about Unsupported JavaFX configuration below can be ignored.");
         Application.launch(MainApp.class, args);
     }
 }