java实现一个动态爱心

很高兴回答您的问题！以下是使用Java实现一个动态爱心的代码示例：

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class DynamicHeart extends JFrame implements ActionListener {
    private Timer timer;
    private int x;
    private int y;
    private int size;
    private final int DELAY = 50;

    public DynamicHeart() {
        setTitle("Dynamic Heart");
        setSize(500, 500);
        setResizable(false);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        x = 200;
        y = 200;
        size = 50;

        timer = new Timer(DELAY, this);
        timer.start();
    }

    public void paint(Graphics g) {
        super.paint(g);

        Graphics2D g2d = (Graphics2D) g;

        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setColor(Color.RED);

        Polygon left = new Polygon();
        left.addPoint(x, y);
        left.addPoint(x + size, y + size);
        left.addPoint(x, y + size * 2);
        left.addPoint(x - size, y + size);

        Polygon right = new Polygon();
        right.addPoint(x, y);
        right.addPoint(x - size, y + size);
        right.addPoint(x, y + size * 2);
        right.addPoint(x + size, y + size);

        g2d.fill(left);
        g2d.fill(right);
    }

    public void actionPerformed(ActionEvent e) {
        x = x + (int) (Math.random() * 21 - 10);
        y = y + (int) (Math.random() * 21 - 10);
        size = size + (int) (Math.random() * 6 - 3);

        if (size < 2) {
            size = 2;
        }

        if (x > getWidth()) {
            x = 0;
        }

        if (x < 0) {
            x = getWidth();
        }

        if (y > getHeight()) {
            y = 0;
        }

        if (y < 0) {
            y = getHeight();
        }

        repaint();
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(() -> {
            DynamicHeart dh = new DynamicHeart();
            dh.setVisible(true);
        });
    }
}

在这个例子中，我们使用Java的Swing和AWT库创建了一个窗口，并实现了一个动态的爱心形状。使用定时器来定期更新爱心的位置和大小，并使用随机数添加一些变化。当爱心变得太小时，我们将它限制为最小的大小。如果爱心移动到窗口边缘之外，它将重新出现在窗口的另一侧。最后，我们调用repaint()方法重绘窗口，使我们的动态爱心形状能够更新。