MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Line2D;

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

public class MainClass extends JPanel {

    public void paint(Graphics g) {
        Graphics2D g2 = (Graphics2D) g;

        int w = getSize().width - 1;
        int h = getSize().height - 1;

        for (int i = 0; i < 12; i++) {
            double angle = Math.PI / 2 - i * Math.PI / 6;
            double x = Math.cos(angle);
            double y = Math.sin(angle);

            Line2D l = new Line2D.Double(100 + 55.0 * x, 100 - 55.0 * y, 100 + 65.0 * x, 100 - 65.0 * y);

            g2.draw(l);
        }
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.getContentPane().add(new MainClass());

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(200, 200);
        frame.setVisible(true);
    }
}