Drawing Polygons in Applet Window Example

A polygon is a closed geometrical figure which can have any number of sides. A polygon can be drawn by using the drawPolygon () method. This method takes three parameters.

The general form of the drawPolygon () method is:

void drawPolygon (int a [], int b [], int n)

where,

a [ ] is the array of integers having x-coordinates

b [ ] is the array of integers having y-coordinates

n is the total number of coordinate points required to draw a polygon.

Here is the java code for the program AppletDrawPolygon :.

import java.applet.Applet; 
 import java.awt.*; 
 import java.awt.event.*; 
 public class AppletDrawPolygon extends Applet 
 { 
              public static void main(String[] args) 
           { 
              Frame OvalApplet = new Frame("Drawing Polygons in Applet Window Example"); 
              OvalApplet.setSize(350, 250); 
              Applet AppletDrawPolygon = new AppletDrawPolygon(); 
              OvalApplet.add(AppletDrawPolygon); 
              OvalApplet.setVisible(true); 
              OvalApplet.addWindowListener(new WindowAdapter() { 
              public void windowClosing(WindowEvent e) { 
              System.exit(0);                                } }); 
           } 
                         public void paint(Graphics g) 
               { 
                    g.setColor(Color.darkGray); 
                   g.setFont(new Font("Arial",Font.BOLD,14)); 
                   g.drawString("Drawing Polygons in Applet Window Example", 15, 40); 
                   g.setFont(new Font("Arial",Font.BOLD,10)); 
                   g.drawString("http://ecomputernotes.com", 200, 205); 
                  //set color to lightgreen 
                 Color lightgreen = new Color(128, 255, 128); 
                 g.setColor(lightgreen); 
                 int PolygonCursor; 
            //Example: the (X_polygon,Y_polygon) points are (10, 70), (160,  70), (100, 115), (160, 160), (10, 160),(60, 115). 
                 There are 6 sets of points, so we will place 6 in place of n. 
             int[] X_polygon = {10, 160, 100, 160, 10, 60}; 
                  int[] Y_polygon = {70,70, 115, 160, 160, 115}; 
                //Syntax:  drawPolygon(int[] xPoints, int[] yPoints, int numPoint); 
             g.drawPolygon (X_polygon, Y_polygon, 6); 
                PolygonCursor = 0; 
                       while (PolygonCursor < 6) 
                       { 
             X_polygon [PolygonCursor] = X_polygon [PolygonCursor] + 170; 
             PolygonCursor = PolygonCursor + 1; 
                       } 
            //The Syntax for fillPolygon(int[] xPoints, int[] yPoints, int numPoint); 
            g.fillPolygon (X_polygon, Y_polygon, 6); 
        } 
 }