Easier way to make a paint application in java?

Question

So basically I have some code I was working on a couple of days ago that is kind of like Paint, which allows you to essentially draw on the screen using the mouse. I kind of

Answer 1

This is a simple example for a practical paint Application, where you can control and change the size and the Color of your drawing.

public class Main extends Application{
    @Override
    public void start(Stage stage){
        try{
            g = can.getGraphicsContext2D();
            g.setStroke(Color.BLACK);
            g.setLineWidth(1);
            c.setValue(Color.BLACK);
            c.setOnAction(e->{
                g.setStroke(c.getValue());
            });
            sli.setMin(1);
            sli.setMax(100);
            sli.setShowTickLabels(true);
            sli.setShowTickMarks(true);
            sli.valueProperty().addListener(e->{
                double val = sli.getValue();
                String str = String.format("%.1f",  val);
                lab.setText(str);
                g.setLineWidth(val);
            });
            gri.addRow(0,  c, sli, lab);
            gri.setHgap(20);
            gri.setAlignement(Pos.TOP_CENTER);
            gri.setPadding( new Insets( 20, 0, 0, 0));

            scene.setOnMousePressed(e->{.
               g.beginPath();
               g.lineTo(e.getSceneX(), e.getSceneY());
               g.stroke();
            });
            scene.setOnMoudrDragged(e->{. 
                g.lineTo(e.getSceneX(),  e.getSceneY());
                g.stroke();
            });
            pan.getChildren().addAll(can, gri);
            stage.setScene(scene);
            stage.show();
        }catch(Exception e){

            e.printStrackTrace();
        }

       Canvas can = new Canvas(760, 490);
       GraphicsContext  g ;
       ColorPicker  c =  new ColorPicker();
       Slider sli = new Slider();
       Label lab = new Label("1.0");
       GridPane gri = new GridPane();
       StackPane pan =  new StackPane();
       Scene  scene = new Scene(pan, 760, 490);
   public static void main (String [] args){
       launch(args);
   }
}