Trying to call a JavaFX application from Java... NoSuchMethodException

Question

I have a main class which should call a JavaFX application (SimpleSun) to get Information from the user. Currently I create an Object of the JavaFX class and start it, but that doesn't seem to work. Does someone see the mistake in my work? Here's my code and exception: Main.java: ``` package ch.i4ds.stix.sim; import ch.i4ds.stix.sim.grid.config.Configuration; import ch.i4ds.stix.sim.grid.config.ConfigurationFromFile; public class Main{ Configuration config; public static void main(String[] args) { ConfigurationFromFile config = new ConfigurationFromFile(); SimpleSun ss = new SimpleSun(config); ss.show(); } } ``` SimpleSun.java: ``` import javafx.application.Application; import javafx.fxml.FXMLLoader; import javafx.scene.Scene; import javafx.scene.layout.BorderPane; import javafx.stage.Stage; import ch.i4ds.stix.sim.grid.config.Configuration; import ch.i4ds.stix.sim.grid.config.ConfigurationFromFile; public class SimpleSun extends Application{ private Stage primaryStage; Configuration…

Accepted Answer

You must provide a constructor with no arguments when you extend application. So you could do something like:

```
public class SimpleSun extends Application {

private Stage primaryStage;
    Configuration configuration;

public SimpleSun() {
        this.configuration = Main.getConfig();
    }
    //...
```

and in your `Main` class:

```
public static Configuration getConfig() { return new ConfigurationFromFile(); }
```

Alternatively you can pass `String` parameters to the class with `launch(args)` and get them back in the `SimpleSun` class with `getParameters()`.

Trying to call a JavaFX application from Java... NoSuchMethodException

Solution

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