Draw spiral shape - Java 2D Graphics

Java examples for 2D Graphics:Shape

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Description

Draw spiral shape

Demo Code

     /*w  w  w. j  a va2 s . com*/

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;

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

public class Main extends JFrame
{
     private static final long serialVersionUID = 62;

     public static void main(String arg[]) 
     {
         JFrame frame = new Main();
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
         frame.setSize(new Dimension(400,400));
         frame.pack();
         frame.setVisible(true);
       }
     
     public Main()
     {
          super("Programming Exercise 2.2");
          JPanel panel = new DrawStuff();
          panel.setPreferredSize(new Dimension(400,400));
          add(panel);
     }
     
     class DrawStuff extends JPanel
     {
          private static final long serialVersionUID = -8;
          int nPoints = 720;

          public DrawStuff()
          {
               
          }
          
           public void paintComponent(Graphics g) 
           {
                super.paintComponent(g);
                Graphics2D g2 = (Graphics2D)g;
                g2.translate(200,200);
                int x1 = 0;
                int y1 = 0;
                int x2;
                int y2;
                for (int i = 0; i < nPoints; i++) 
                {
                     double t = i * Math.PI / 180;
                     x2 = (int) ((int) 20*t*Math.cos(t));
                     y2 = (int) ((int) 20*t*Math.sin(t));
                     g2.drawLine(x1, y1, x2, y2);
                     x1 = x2;
                     y1 = y2;
                }
           }
     }
}

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