有没有搞人帮看一下这个怎么做，后面不会做了。

Question

问题:让我们表示大小的模拟时钟的初始大小。
当客户端的半径为r时，t秒中同心的半径为r*t/60。
将刻度添加到手表中。
设计是自由。
您可以使用形状来标记比例或添加数字。

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

public class ClockWriter extends JPanel {

private final int SIZE;

public ClockWriter(int n) {
    SIZE = n;
    JFrame frame = new JFrame();
    frame.setTitle("Clock");
    frame.setSize(SIZE+50, SIZE+150);
    frame.getContentPane().add(this);
    frame.setVisible(true);
    frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}

public void paintComponent(Graphics g) {
    g.setColor(Color.BLUE);
    g.drawString("TIME IS GOLD", 105, 50);
    g.setColor(Color.LIGHT_GRAY);
    g.fillOval(25, 100, SIZE, SIZE);
    LocalTime now = LocalTime.now();
    int radius = SIZE / 2;
     int x1 = 25 + radius;
     int y1 = 100 + radius;
     radius -= 30;
      double t = now.getSecond();
     double l = t/60;
     int r = (int)(SIZE*(l));
         
     g.setColor(Color.PINK);
     g.fillOval(r,r,r,r);
     double minute_angle = (now.getMinute() - 15) * Math.PI / 30;
     int x2 = x1 + (int)(radius * Math.cos(minute_angle));
     int y2 = y1 + (int)(radius * Math.sin(minute_angle));
     g.setColor(Color.RED);
     g.drawLine(x1, y1, x2, y2);
     radius -= 30;
     double hour_angle = (now.getHour() - 3) * Math.PI / 6 + minute_angle / 12;
     x2 = x1 + (int)(radius * Math.cos(hour_angle));
     y2 = y1 + (int)(radius * Math.sin(hour_angle));
     g.setColor(Color.YELLOW);
     g.drawLine(x1, y1, x2, y2);
}

public static void main(String[] args) {
    new ClockWriter(250);
}

}

Answer 1

帮你调整了一下参数，分针的角度如果以12点钟方向为基准，比较好计算，顺便加了一下动态刷新和刻度盘。如果对你有帮助，请采纳

public class ClockWriter extends JPanel{
    private final int SIZE;

    public ClockWriter(int n) {
        SIZE = n;
        JFrame frame = new JFrame();
        frame.setTitle("Clock");
        frame.setSize(SIZE+50, SIZE+150);
        frame.getContentPane().add(this);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public void paintComponent(Graphics g) {
        g.setColor(Color.BLUE);
        g.drawString("TIME IS GOLD", 105, 50);
        g.setColor(Color.LIGHT_GRAY);
        g.fillOval(25, 100, SIZE, SIZE);
        LocalTime now = LocalTime.now();
        int radius = SIZE / 2;
        int x1 = 25 + radius;
        int y1 = 100 + radius;
        radius -= 30;
        double t = now.getSecond();
        double l = t/60;
        int r = (int)(SIZE*(l));

        // 绘制刻度盘
        paintClockDialog(g);

        g.setColor(Color.PINK);
        // 改动行1
        g.fillOval(25 + (SIZE - r) / 2, 100 + (SIZE - r) / 2, r, r);

        // 改动行2，12点方向顺时针到分针的夹角
        double minute_angle = 2 * Math.PI * now.getMinute() / 60;
        // 改动行3, 4
        int x2 = x1 + (int)(radius * Math.sin(minute_angle));
        int y2 = y1 - (int)(radius * Math.cos(minute_angle));
        g.setColor(Color.RED);
        g.drawLine(x1, y1, x2, y2);
        radius -= 30;
        double hour_angle = (now.getHour() - 3) * Math.PI / 6 + minute_angle / 12;
        x2 = x1 + (int)(radius * Math.cos(hour_angle));
        y2 = y1 + (int)(radius * Math.sin(hour_angle));
        g.setColor(Color.YELLOW);
        g.drawLine(x1, y1, x2, y2);
    }

    private void paintClockDialog(Graphics g) {
        g.setColor(Color.BLACK);
        int radius = SIZE / 2;
        int x = 25 + radius, y = 100 + radius;
        for (int i = 0; i < 12; i++) {
            double angle = 2 * Math.PI * i / 12d;
            int x1 = x + (int)((radius - 9) * Math.sin(angle));
            int y1 = y + (int)((radius - 9) * Math.cos(angle));
            int x2 = x + (int)(radius * Math.sin(angle));
            int y2 = y + (int)(radius * Math.cos(angle));
            g.drawLine(x1, y1, x2, y2);
        }
    }

    public static void main(String[] args) {
        // 改动5，1秒钟刷新1次
        ClockWriter clockWriter = new ClockWriter(250);
        while (true) {
            clockWriter.repaint(1000);
        }
    }
}