抖音时间罗盘java代码

抖音时间罗盘是一种根据系统时间动态变换背景颜色的效果，可以通过以下Java代码实现：

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Calendar;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;

public class DouyinTimeCompass extends JPanel implements ActionListener {
    private Timer timer;

    public DouyinTimeCompass() {
        timer = new Timer(1000, this);
        timer.start();
    }

    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2d = (Graphics2D) g;
        Calendar cal = Calendar.getInstance();
        int hour = cal.get(Calendar.HOUR_OF_DAY);
        int minute = cal.get(Calendar.MINUTE);
        int second = cal.get(Calendar.SECOND);

        int r = 200;
        int x = getWidth() / 2;
        int y = getHeight() / 2;

        RenderingHints rh = new RenderingHints(
                RenderingHints.KEY_ANTIALIASING,
                RenderingHints.VALUE_ANTIALIAS_ON);

        g2d.setRenderingHints(rh);

        drawBackground(g2d, x, y, r);

        drawHourHand(g2d, x, y, r, hour, minute);
        drawMinuteHand(g2d, x, y, r, minute, second);
        drawSecondHand(g2d, x, y, r, second);
    }

    private void drawBackground(Graphics2D g2d, int x, int y, int r) {
        int[] colors = {0xFFEEC900, 0xFF4285F4, 0xFF34A853, 0xFFEA4335};
        int direction = Calendar.getInstance().get(Calendar.SECOND) % 4;
        g2d.setColor(new Color(colors[direction]));
        g2d.fillOval(x - r, y - r, 2 * r, 2 * r);
    }

    private void drawHourHand(Graphics2D g2d, int x, int y, int r, int hour, int minute) {
        int handRadius = (int) (r * 0.4);
        int angle = (int) ((hour + minute / 60.0) / 12 * 360 - 90);
        int handX = (int) (x + Math.cos(Math.toRadians(angle)) * handRadius);
        int handY = (int) (y + Math.sin(Math.toRadians(angle)) * handRadius);
        g2d.setColor(Color.white);
        g2d.drawLine(x, y, handX, handY);
    }

    private void drawMinuteHand(Graphics2D g2d, int x, int y, int r, int minute, int second) {
        int handRadius = (int) (r * 0.6);
        int angle = (int) ((minute + second / 60.0) / 60 * 360 - 90);
        int handX = (int) (x + Math.cos(Math.toRadians(angle)) * handRadius);
        int handY = (int) (y + Math.sin(Math.toRadians(angle)) * handRadius);
        g2d.setColor(Color.white);
        g2d.drawLine(x, y, handX, handY);
    }

    private void drawSecondHand(Graphics2D g2d, int x, int y, int r, int second) {
        int handRadius = (int) (r * 0.9);
        int angle = (int) ((second) / 60.0 * 360 - 90);
        int handX = (int) (x + Math.cos(Math.toRadians(angle)) * handRadius);
        int handY = (int) (y + Math.sin(Math.toRadians(angle)) * handRadius);
        g2d.setColor(Color.white);
        g2d.drawLine(x, y, handX, handY);
    }

    public void actionPerformed(ActionEvent e) {
        repaint();
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("Douyin Time Compass");
        DouyinTimeCompass compass = new DouyinTimeCompass();
        frame.add(compass);
        frame.setSize(new Dimension(400, 400));
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

以上代码是通过Java Swing来实现抖音时间罗盘的效果。代码中使用了Timer类来定时更新界面，根据系统时间获取小时、分钟、秒钟，然后根据这些值计算时针、分针和秒针的位置，并在界面上绘制各个指针。同时，根据当前秒钟数的奇偶性来决定背景颜色的变换。