Analog Clock

import javax.swing.*;
import java.awt.*;
import java.util.Date;

public class Uhr {

    JFrame frame = new JFrame();
    Graphics g;

    public Uhr() {
        frame.setSize(350, 350);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public void run() {
        frame.setVisible(true);
        g = frame.getGraphics();
        int x = 20 + 280 / 2, y = 50 + 280 / 2;

        while (true) {
            g.clearRect(0, 0, 350, 350);
            g.drawOval(20, 50, 280, 280);
            Date date = new Date();

            int min = date.getMinutes(), sec = date.getSeconds();
            double hr = ((date.getHours() + 1) % 12) + (((double) min) / 60);
            int hr_x = (int) (Math.cos((((2 * Math.PI) / 12) * hr) - 0.5 * Math.PI) / 2 * 140);
            int hr_y = (int) (Math.sin((((2 * Math.PI) / 12) * hr) - 0.5 * Math.PI) / 2 * 140);
            int min_x = (int) (Math.cos((2 * Math.PI / 60 * min) - 0.5 * Math.PI) * 140);
            int min_y = (int) (Math.sin((2 * Math.PI / 60 * min) - 0.5 * Math.PI) * 140);
            int sec_x = (int) (Math.cos((2 * Math.PI / 60 * sec) - 0.5 * Math.PI) * 140);
            int sec_y = (int) (Math.sin((2 * Math.PI / 60 * sec) - 0.5 * Math.PI) * 140);

            //System.out.printf("Zeit: %s:%s:%s, Coords: hr: %s,%s; min: %s,%s%n", hr, min, sec, hr_x, hr_y, min_x, min_y);

            g.drawLine(x, y, x + hr_x, y + hr_y);
            g.drawLine(x, y, x + min_x, y + min_y);
            g.drawLine(x, y, x + sec_x, y + sec_y);
            try {Thread.sleep(500);} catch (InterruptedException e) {e.printStackTrace(); return;}
        }

    }
}