JavaFX矩形椭圆

矩形椭圆

JavaFX Shape类定义了常见的形状，例如线，矩形，圆，Arc，CubicCurve，Ellipse和QuadCurve。
在场景图上绘制矩形需要宽度，高度和左上角的(x，y)位置。
要在JavaFX中绘制一个矩形，可以使用javafx.scene.shape.Rectangle类。

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
public class Main extends Application {
    public static void main(String[] args) {
        Application.launch(args);
    }
    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("矩形示例");
        Group root = new Group();
        Scene scene = new Scene(root, 300, 250, Color.WHITE);
        Rectangle r = new Rectangle();
        //r.setFill(Color.RED);
        r.setX(50);
        r.setY(50);
        r.setWidth(200);
        r.setHeight(100);
        root.getChildren().add(r); 
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

圆角矩形

Rectangle类实现了弧宽和弧高。可以使用这些功能来绘制圆角矩形。

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
public class Main extends Application {
    public static void main(String[] args) {
        Application.launch(args);
    }
    @Override
    public void start(Stage stage) throws Exception {
        stage.setTitle("圆角矩形示例");
        Group group = new Group();
        //x - 矩形的水平位置
        //y - 矩形的垂直位置
        //width - 矩形的宽度
        //height - 矩形的高度
        Rectangle rect = new Rectangle(20, 20, 200, 200);
        rect.setArcHeight(15);
        rect.setArcWidth(15);
        rect.setStroke(Color.BLACK);
        group.getChildren().add(rect);
        Scene scene = new Scene(group, 300, 300);
        stage.setScene(scene);
        stage.show();
    }
}

椭圆示例

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.effect.DropShadow;
import javafx.scene.paint.Color;
import javafx.scene.shape.Ellipse;
import javafx.stage.Stage;
public class Main extends Application {
    public static void main(String[] args) {
        Application.launch(args);
    }
    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("椭圆示例");
        Group root = new Group();
        Scene scene = new Scene(root, 300, 250, Color.WHITE);
        Group g = new Group();
        DropShadow ds = new DropShadow();
        ds.setOffsetY(3.0);
        ds.setColor(Color.color(0.4, 0.4, 0.4));
        Ellipse ellipse = new Ellipse();
        ellipse.setCenterX(50.0f);
        ellipse.setCenterY(50.0f);
        ellipse.setRadiusX(50.0f);
        ellipse.setRadiusY(25.0f);
        ellipse.setEffect(ds);
        g.getChildren().add(ellipse);
        root.getChildren().add(g);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}