FillPolyPanel.java Source code

Introduction

Here is the source code for FillPolyPanel.java

Source

import java.awt.Container;
import java.awt.Graphics;
import java.awt.Polygon;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

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

public class FillPolyPanel extends JPanel {
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        int radius = 40;
        int centerX = 50;
        int centerY = 100;
        int angle = 30;

        int dx = (int) (radius * Math.cos(angle * Math.PI / 180));
        int dy = (int) (radius * Math.sin(angle * Math.PI / 180));

        g.fillArc(centerX - radius, centerY - radius, 2 * radius, 2 * radius, angle, 360 - 2 * angle);

        Polygon p = new Polygon();
        centerX = 150;
        for (int i = 0; i < 5; i++)
            p.addPoint((int) (centerX + radius * Math.cos(i * 2 * Math.PI / 5)),
                    (int) (centerY + radius * Math.sin(i * 2 * Math.PI / 5)));

        g.fillPolygon(p);

        p = new Polygon();
        centerX = 250;
        for (int i = 0; i < 360; i++) {
            double t = i / 360.0;
            p.addPoint((int) (centerX + radius * t * Math.cos(8 * t * Math.PI)),
                    (int) (centerY + radius * t * Math.sin(8 * t * Math.PI)));
        }
        g.fillPolygon(p);
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setTitle("FillPoly");
        frame.setSize(300, 200);
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        Container contentPane = frame.getContentPane();
        contentPane.add(new FillPolyPanel());

        frame.show();
    }

}