JavaFX Day - 1

JavaFX 2D shapes

The package javafx.scene.shape containes various classes that can be used to make 2D shapes in our JavaFX application.

Using javaFX we can create 2D shapes like Line, Rectangle, Circle, Ellipse, Polygon, Arc, etc.

How to create any 2D shape in JavaFX?

• create an object of respective class :

  Line line1 = new Line();

• Set the required properties using respective methods.
• Add class object to Group layout using

  Group root = new Group();
  root.getChildren().add(line1);

The reason behind using Group layout: It is a container component in which every child components are positioned at 0,0;

Shape	Class
Line	javafx.scene.shape.Line
Rectangle	javafx.scene.shape.Rectangle
Ellipse	javafx.scene.shape.Ellipse
Arc	javafx.scene.shape.Arc
Circle	javafx.scene.shape.Circle
Polygon	javafx.scene.shape.Polygon
Cubic Curve	javafx.scene.shape.CubicCurve
Quad Curve	javafx.scene.shape.QuadCurve

1. JavaFX Program that creates Diagonal on the Screen.

import javafx.application.Application;
import javafx.geometry.Rectangle2D;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.shape.Line;
import javafx.stage.Screen;
import javafx.stage.Stage;

public class DrawDiagonal extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {

        Rectangle2D screenBounds = Screen.getPrimary().getBounds();
        System.out.println(screenBounds);

        Line line1 = new Line();
        line1.setStartX(0);
        line1.setStartY(0);
        line1.setEndX(screenBounds.getMaxX());
        line1.setEndY(screenBounds.getMaxY());

        Group root = new Group();
        root.getChildren().add(line1);

        Scene scene = new Scene(root, screenBounds.getWidth(), screenBounds.getHeight() - 80);
        primaryStage.setScene(scene);
        primaryStage.setTitle("DrawDiagonal by Kanu Thakor");
        primaryStage.show();
    }

    public static void main(String[] args) {
        // Here you can work with args - command line parameters
        Application.launch(args);
    }
}

output

2. Javafx program that creates a rectangle with height and width slightly less than desktop's screen resolution

import javafx.application.Application;
import javafx.geometry.Rectangle2D;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.shape.Line;
import javafx.scene.shape.Rectangle;
import javafx.stage.Screen;
import javafx.stage.Stage;

public class DrawRectangle extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {

        Rectangle2D screenBounds = Screen.getPrimary().getBounds();
        System.out.println(screenBounds);

        Rectangle rect = new Rectangle();
        rect.setX(20);
        rect.setY(20);
        rect.setWidth(screenBounds.getWidth() - 80);
        rect.setHeight(screenBounds.getHeight() - 100);

        Group root = new Group();
        root.getChildren().add(rect);

        Scene scene = new Scene(root, screenBounds.getWidth(), screenBounds.getHeight() - 80);
        primaryStage.setScene(scene);
        primaryStage.setTitle("DrawDiagonal by Kanu Thakor");
        primaryStage.show();
    }

    public static void main(String[] args) {
        // Here you can work with args - command line parameters
        Application.launch(args);
    }
}

Output