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- /**Following example demonstrates how to draw a polygon by creating Polygon() object. addPoint() & drawPolygon() method is used to draw the Polygon.**/
- import java.awt.*;
- import java.awt.event.*;
- import javax.swing.*;
- public class Main extends JPanel {
- public void paintComponent(Graphics g) {
- super.paintComponent(g);
- Polygon p = new Polygon();
- for (int i = 0; i < 5; i++) p.addPoint((int) (
- 100 + 50 * Math.cos(i * 2 * Math.PI / 5)),(int) (100 + 50 * Math.sin(
- i * 2 * Math.PI / 5)));
- g.drawPolygon(p);
- }
- public static void main(String[] args) {
- JFrame frame = new JFrame();
- frame.setTitle("Polygon");
- frame.setSize(350, 250);
- frame.addWindowListener(new WindowAdapter() {
- public void windowClosing(WindowEvent e) {
- System.exit(0);
- }
- });
- Container contentPane = frame.getContentPane();
- contentPane.add(new Main());
- frame.setVisible(true);
- }
- }
- //================================example two========================
- import java.awt.Color;
- 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 Panel extends JPanel {
- public void paintComponent(Graphics g) {
- super.paintComponent(g);
- Polygon p = new Polygon();
- for (int i = 0; i < 5; i++) p.addPoint((int) (
- 100 + 50 * Math.cos(i * 2 * Math.PI / 5)),(int) (
- 100 + 50 * Math.sin(i * 2 * Math.PI / 5)));
- g.drawPolygon(p);
- }
- public static void main(String[] args) {
- JFrame frame = new JFrame();
- frame.getContentPane().setBackground(Color.YELLOW);
- frame.setTitle("DrawPoly");
- frame.setSize(350, 250);
- frame.addWindowListener(new WindowAdapter() {
- public void windowClosing(WindowEvent e) {
- System.exit(0);
- }
- });
- Container contentPane = frame.getContentPane();
- contentPane.add(new Panel());
- frame.show();
- }
- }
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