Как исправить 'В рабочей области не установлены JRE, которые строго совместимы с этой средой. «?

Question

Я скачал JavaFX Scene Builder 2.0, затем я создал новый проект JavaFX в Eclipse.

К сожалению, эта ошибка возникает:

Не удается разрешить импорт Javafx

Ниже журнала:

Eclipse version : 2019-09
JDK version : 13

Problem Description

Application cannot be resolved to a type
BorderPane cannot be resolved to a type
BorderPane cannot be resolved to a type
Scene cannot be resolved to a type
Scene cannot be resolved to a type
Stage cannot be resolved to a type
The import javafx cannot be resolved
The import javafx cannot be resolved
The import javafx cannot be resolved
The import javafx cannot be resolved
The method launch(String[]) is undefined for the type Main

Warnings
Build path specifies execution environment JavaSE-12. There are no JREs installed in the workspace that are strictly compatible with this environment.  hello       Build path  JRE System Library Problem

Console
Error: Unable to initialize main class application.Main
Caused by: java.lang.NoClassDefFoundError: Stage

IВы уже скачали e (fx) clipse 3.6.0

package application;

import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;


public class Main extends Application {


    @Override
    public void start(Stage primaryStage) {

    try{

    BorderPane root = new BorderPane();
            Scene scene = new Scene(root,400,400);
            scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
            primaryStage.setScene(scene);
            primaryStage.show();
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {


    launch(args);
    }
}