Drawing polygon

You can draw a polygon shape on the window by using the drawPolygon(array_xpoint, array_ypoints, num_points)method of the Graphics class. To fill the oval with color you need to use the fillPolygon(array_xpoints, array_ypoints, num_points) method. The first argument is the array of x values(x-coordinate); the second argument is the array of y values(y-coordinate) and the last one is the number of points of the polygon shape.

Example:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Polygon extends Canvas{
public Polygon(){
setSize(500,400);//set the window size

}
public void paint(Graphics g){
  g.setColor(Color.green);
  int[] xpoint=new int[]{10,100,150,300};
  int[] ypoint=new int[]{10,100,120,100};
  g.drawPolygon(xpoint,ypoint,4);
  g.fillPolygon(xpoint,ypoint,4);

   }
}

public class DrawPolygon implements ActionListener{
public static void main(String args[]){
  Polygon p=new Polygon();
  JFrame frame=new JFrame("Polygons");
  frame.add(p); //show the drawing
  frame.pack();//make sure the window opening as expected
  frame.addWindowListener(new Listener());
  frame.setVisible(true);
}

public void actionPerformed(ActionEvent e){
}

static class Listener extends WindowAdapter{


public void windowClosing(WindowEvent event){

  System.exit(0);

        }

   }

}


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