Java Error: Could not find or load main Class on Raspberry

Question

I'm trying to learn JavaFX in combination with a Raspberry Pi with the OS Raspian (Jessie). Right now I'm coding in IntelliJ IDE with a basic example of JavaFX. My Windows 10 PC is using the newest SDK. 8.0 JDK. The Raspian is using 8.0

When I compile the software on my Windows PC I'm getting a .jar File. I made sure that the Artifacts are correct and linked to the main class of the package. The problem what I expecting is when I run the .jar on the Raspberry that I'm getting the following error:

Error: Could not find or load Main class sample.Main

The command that I'm executing:

java -jar care.jar

I made sure that the JDK is installed correctly. The Java package should be compiled right for Linux.

The code that I'm using is a standard example of IntelliJ. sample.Main

 package sample;

        import javafx.application.Application;
        import javafx.fxml.FXMLLoader;
        import javafx.scene.Parent;
        import javafx.scene.Scene;
        import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        primaryStage.setTitle("Hello World");
        primaryStage.setScene(new Scene(root, 300, 275));
        primaryStage.show();
    }


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

sample.fxml

<?import javafx.geometry.Insets?>
<?import javafx.scene.layout.GridPane?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<GridPane fx:controller="sample.Controller"
          xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">
</GridPane>

Artifacts settings

Structure tree + IDE overview

I tried to add the .class files in the same directory of the .jar file. But with no luck.

Answer 1

The error message says that your java -jar command tries to find a class named main in the sample package. But your class is named Main.

There probably is a wrong entry in your manifest file for the Main class attribute with main spelled with a lower case 'm' instead of Main with a capital 'M'.

Edit/Update:

The jar file is quite alright, I suppose it is a problem with the Java installation on the Raspberry Pi.

Here some links concerning that problem:

Can JavaFX be used on Raspberry Pi

How can i get JavaFX working on raspberry pi 3

https://www.experts-exchange.com/questions/29008944/Running-JavaFX-on-the-Raspberry-Pi.html