Check if JavaFX is installed, Check if OS is compatible

Author: airsquared

src/main/java/blobsaver/Main.java

@@ -1,5 +1,6 @@
 package blobsaver;
 
+import com.sun.javafx.PlatformUtil;
 import javafx.application.Application;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.Parent;
@@ -8,24 +9,46 @@
 
 import java.io.IOException;
 
-public class Main extends Application {
+public class Main {
 
     static final String appVersion = "v1.2";
     static Stage primaryStage;
 
     public static void main(String[] args) {
-        launch(args);
+        try {
+            Class.forName("javafx.application.Application");
+            if (PlatformUtil.isMac() || PlatformUtil.isWindows() || PlatformUtil.isLinux()) {
+                JavaFxApplication.launchit(args);
+            } else {
+                int result = javax.swing.JOptionPane.showOptionDialog(null, "Cannot detect the OS. Assuming it is Linux. Continue?",
+                        "Warning", javax.swing.JOptionPane.OK_CANCEL_OPTION, javax.swing.JOptionPane.WARNING_MESSAGE, null, null, null);
+                if (result == javax.swing.JOptionPane.CANCEL_OPTION) {
+                    System.exit(0);
+                }
+                JavaFxApplication.launchit(args);
+            }
+        } catch (ClassNotFoundException e) {
+            javax.swing.JOptionPane.showMessageDialog(null, "JavaFX is not installed. Either install Oracle Java or\nif you are using OpenJRE/OpenJDK, install openjfx.\nOn Linux, use sudo apt-get install openjfx", "Error", javax.swing.JOptionPane.ERROR_MESSAGE);
+            System.exit(-1);
+        }
     }
 
-    @Override
-    public void start(Stage primaryStage) throws IOException {
-        Main.primaryStage = primaryStage;
-        Parent root = FXMLLoader.load(getClass().getResource("blobsaver.fxml"));
-        primaryStage.setTitle("SHSH Blob Saver " + appVersion);
-        primaryStage.setScene(new Scene(root));
-        primaryStage.getScene().getStylesheets().add(getClass().getResource("app.css").toExternalForm());
-        primaryStage.show();
-        primaryStage.setResizable(false);
-        Controller.setPresetButtonNames();
+    public static class JavaFxApplication extends Application {
+
+        static void launchit(String[] args) {
+            launch(args);
+        }
+
+        @Override
+        public void start(Stage primaryStage) throws IOException {
+            Main.primaryStage = primaryStage;
+            Parent root = FXMLLoader.load(getClass().getResource("blobsaver.fxml"));
+            primaryStage.setTitle("SHSH Blob Saver " + Main.appVersion);
+            primaryStage.setScene(new Scene(root));
+            primaryStage.getScene().getStylesheets().add(getClass().getResource("app.css").toExternalForm());
+            primaryStage.show();
+            primaryStage.setResizable(false);
+            Controller.setPresetButtonNames();
+        }
     }
-}
+}