如何用Java做动态爱心

在Java中制作动态爱心形状通常需要使用Swing或JavaFX库来绘制图形，这里我会提供一个简单的JavaFX示例来创建一个旋转的心形动画。首先，你需要导入JavaFX相关的包，并且了解如何使用`Path`、`Rotate`和`Timeline`。

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Path;
import javafx.scene.shape.Shape;
import javafx.stage.Stage;
import javafx.animation.AnimationTimer;
import javafx.animation.Rotate;

public class DynamicHeart extends Application {

    private Shape heartShape;
    private double rotationAngle = 0;
    
    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        heartShape = createHeartShape();
        Scene scene = new Scene(new StackPane(heartShape), 400, 400, Color.TRANSPARENT);
        
        // 创建定时器，每秒旋转心形
        AnimationTimer timer = new AnimationTimer() {
            @Override
            public void handle(long now) {
                rotationAngle += 5; // 每次增加5度
                heartShape.setTransform(new Rotate(rotationAngle, heartShape.getBoundsInLocal().getWidth() / 2, heartShape.getBoundsInLocal().getHeight() / 2));
                if (rotationAngle >= 360) { // 当达到一圈时，重置角度
                    rotationAngle = 0;
                }
            }
        };
        timer.start();

        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private Shape createHeartShape() {
        double width = 200;
        double height = 150;
        Path path = new Path();
        path.setFill(Color.RED);

        path.moveTo(-width * 0.87, -height);
        path.lineTo(-width * 0.5, -height * 1.15);
        path.lineTo(0, -height * 0.9);
        path.lineTo(width * 0.5, -height * 1.15);
        path.lineTo(width * 0.87, -height);
        path.lineTo(width * 0.5, -height * 0.9);
        path.lineTo(0, -height * 0.65);
        path.lineTo(-width * 0.5, -height * 0.9);
        path.close();

        return path;
    }
}