java爱心代码跳动可运行

在Java中，实现一个爱心代码跳动效果通常涉及到动画或者GUI编程。这里我们可以用Swing库来创建一个简单的爱心形状，并通过定时器让它看起来像是在跳动。以下是一个基本的示例代码：

import javax.swing.*;
import java.awt.geom.Path2D;
import java.awt.geom.Point2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class HeartBouncer extends JFrame {
    private JLabel heartLabel;
    private Timer timer;

    public HeartBounce() {
        setSize(400, 400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new FlowLayout());

        // 创建爱心形状
        Shape heartShape = createHeartShape();

        // 创建label并设置背景为透明
        heartLabel = new JLabel(new ShapeIcon(heartShape), SwingConstants.CENTER);
        heartLabel.setBackground(new Color(0, 0, 0, 0)); // 透明背景

        // 添加到窗口
        add(heartLabel);

        // 初始化定时器
        timer = new Timer(50, new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                Point2D.Float position = heartLabel.getIcon().getIconRect().getLocation();
                position.y += 2; // 每次跳跃增加2个像素高度
                if (position.y > getHeight()) {
                    position.y = 0; // 当超出屏幕顶部时重置
                }
                heartLabel.setBounds(position.x, position.y, heartLabel.getWidth(), heartLabel.getHeight());
            }
        });
        timer.start();
    }

    private Shape createHeartShape() {
        Path2D.Float path = new Path2D.Float();
        path.moveTo(-50, -30);
        path.lineTo(-40, -30);
        path.lineTo(-40, -40);
        path.lineTo(0, -40);
        path.lineTo(0, -50);
        path.lineTo(10, -50);
        path.lineTo(10, -60);
        path.lineTo(20, -60);
        path.lineTo(20, -70);
        path.lineTo(30, -70);
        path.lineTo(30, -80);
        path.lineTo(40, -80);
        path.lineTo(40, -90);
        path.lineTo(50, -90);
        path.lineTo(50, -80);
        path.lineTo(60, -80);
        path.lineTo(60, -70);
        path.lineTo(70, -70);
        path.lineTo(70, -60);
        path.lineTo(80, -60);
        path.lineTo(80, -50);
        path.lineTo(90, -50);
        path.lineTo(90, -40);
        path.lineTo(100, -40);
        path.lineTo(100, -30);
        path.closePath();
        return path;
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new HeartBounce().setVisible(true);
            }
        });
    }
}

class ShapeIcon implements Icon {
    private Shape shape;

    public ShapeIcon(Shape shape) {
        this.shape = shape;
    }

    @Override
    public void paintIcon(Component c, Graphics g, int x, int y) {
        Graphics2D g2d = (Graphics2D) g.create();
        g2d.setPaint(Color.RED);
        g2d.fill(shape);
        g2d.dispose();
    }

    @Override
    public int getIconWidth() {
        return (int) Math.ceil(shape.getBounds().getWidth());
    }

    @Override
    public int getIconHeight() {
        return (int) Math.ceil(shape.getBounds().getHeight());
    }
}