Java如何实现动态爱心？

在Java中，尤其是Swing或JavaFX这样的图形用户界面框架，可以使用形状生成、动画或者其他绘图技术来实现动态爱心图案。这里提供一个基本的Java Swing示例，使用Graphics2D绘制动态爱心：

import javax.swing.*;
import java.awt.*;
import java.awt.geom.Arc2D;

public class DynamicHeart extends JComponent {

    private int x, y;
    private double rotationAngle;

    public DynamicHeart() {
        setPreferredSize(new Dimension(100, 100));
        startAnimation();
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        // 绘制爱心的弧形部分
        g2d.setStroke(new BasicStroke(2));
        g2d.setColor(Color.RED);
        g2d.draw(new Arc2D.Float(x, y, getWidth(), getHeight(), -45, 180, Arc2D.OPEN));

        // 渲染并旋转爱心
        g2d.rotate(rotationAngle, getWidth() / 2, getHeight() / 2);
        g2d.dispose();
    }

    private void startAnimation() {
        Timer timer = new Timer(50, e -> {
            if (rotationAngle <= 180) {
                rotationAngle += 5;
            } else {
                resetRotation();
            }
            repaint();
        });
        timer.start();
    }

    private void resetRotation() {
        rotationAngle = 0;
    }

    public void pauseAnimation() {
        ((Timer) getToolkit().getSystemEventQueue().peek()).stop();
    }

    public void resumeAnimation() {
        startAnimation();
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("Dynamic Heart");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(new DynamicHeart());
        frame.pack();
        frame.setVisible(true);
    }
}

这段代码创建了一个JComponent，爱心会随着时间逐渐从左向右旋转。你可以通过调用pauseAnimation()和resumeAnimation()方法来控制动画的播放。