public class ShowPolygon extends Application
class MyPolygon extends Pane
1:
2: import javafx.application.Application;
3: import javafx.collections.ObservableList;
4: import javafx.scene.Scene;
5: import javafx.scene.layout.Pane;
6: import javafx.scene.paint.Color;
7: import javafx.stage.Stage;
8: import javafx.scene.shape.Polygon;
9:
10: public class ShowPolygon extends Application {
11: @Override // Override the start method in the Application class
12: public void start(Stage primaryStage) {
13: // Create a scene and place it in the stage
14: Scene scene = new Scene(new MyPolygon(), 400, 400);
15: primaryStage.setTitle("ShowPolygon"); // Set the stage title
16: primaryStage.setScene(scene); // Place the scene in the stage
17: primaryStage.show(); // Display the stage
18: }
19:
20: /**
21: * The main method is only needed for the IDE with limited
22: * JavaFX support. Not needed for running from the command line.
23: */
24: public static void main(String[] args) {
25: launch(args);
26: }
27: }
28:
29: class MyPolygon extends Pane {
30: private void paint() {
31: // Create a polygon and place polygon to pane
32: Polygon polygon = new Polygon();
33: polygon.setFill(Color.WHITE);
34: polygon.setStroke(Color.BLACK);
35: ObservableList<Double> list = polygon.getPoints();
36:
37: double centerX = getWidth() / 2, centerY = getHeight() / 2;
38: double radius = Math.min(getWidth(), getHeight()) * 0.4;
39:
40: // Add points to the polygon list
41: for (int i = 0; i < 6; i++) {
42: list.add(centerX + radius * Math.cos(2 * i * Math.PI / 6));
43: list.add(centerY - radius * Math.sin(2 * i * Math.PI / 6));
44: }
45:
46: getChildren().clear();
47: getChildren().add(polygon);
48: }
49:
50: @Override
51: public void setWidth(double width) {
52: super.setWidth(width);
53: paint();
54: }
55:
56: @Override
57: public void setHeight(double height) {
58: super.setHeight(height);
59: paint();
60: }
61: }