package price;

import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.paint.Color;

public class PriceGraph {

    public Canvas Paint(){
        final Canvas canvas=new Canvas(1280,800);
        GraphicsContext gc = canvas.getGraphicsContext2D();
        gc.setFill(Color.LIGHTGREY);
        gc.fillRect(8,60,1280,700);
        return canvas;
    }    
}


Здесь я вызываю класс

   private void Graphic(){
         sp=new Pane();
         sp.setLayoutX(8);
         sp.setLayoutY(60);
         sp.setPrefSize(550,700);
         sp.setStyle("-fx-background-color:lightgrey;");
         anhorPanePrice.getChildren().add(sp); 
    PriceGraph priceGraph=new PriceGraph();
    anhorPanePrice.getChildren().add(priceGraph.Paint());
   }