Inserimento Scroll

[rangers97]

ok grazie mille , però adesso sorge un'altro problema ovvero posso scendere con l'immagine ma non esiste niente , ovvero crea l'immagine solamente nel punto iniziale e se scendo nn c'è niente.
ho anche provato a modificare il colore, intendevi così??

import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
import java.util.Random;
import java.awt.Color;
import java.io.*;
import java.util.*;
import javax.swing.JFrame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JPanel;
import javax.swing.JScrollPane;


public class PixelCanvas extends Canvas {


    public static Color colore(int c) {
        Color f;
        int i = c % 16;
        if (i == 0) {
            return f = new Color(66, 30, 15);
        }
        if (i == 1) {
            return f = new Color(25, 7, 26);
        }
        if (i == 2) {
            return f = new Color(9, 1, 47);
        }
        if (i == 3) {
            return f = new Color(4, 4, 73);
        }
        if (i == 4) {
            return f = new Color(0, 7, 100);
        }
        if (i == 5) {
            return f = new Color(12, 44, 138);
        }
        if (i == 6) {
            return f = new Color(24, 82, 177);
        }
        if (i == 7) {
            return f = new Color(57, 125, 209);
        }
        if (i == 8) {
            return f = new Color(134, 181, 229);
        }
        if (i == 9) {
            return f = new Color(211, 236, 248);
        }
        if (i == 10) {
            return f = new Color(241, 233, 191);
        }
        if (i == 11) {
            return f = new Color(248, 201, 95);
        }
        if (i == 12) {
            return f = new Color(255, 170, 0);
        }
        if (i == 13) {
            return f = new Color(204, 128, 0);
        }
        if (i == 14) {
            return f = new Color(153, 87, 0);
        }
        if (i == 15) {
            return f = new Color(106, 52, 3);
        }
        return f = new Color(106, 52, 3);
    }


    public static Color colore2(int c) {
        Color f;
        if (c < 64) {
            return f = new Color(c * 2, 0, 0);
        } else if (c < 128) {
            return f = new Color((((c - 64) * 128) / 126) + 128, 0, 0);
            /* 0x0080 to 0x00C0 */
        } else if (c < 256) {
            return f = new Color((((c - 128) * 62) / 127) + 193, 0, 0);
            /* 0x00C1 to 0x00FF */
        } else if (c < 512) {
            return f = new Color(255, (((c - 256) * 62) / 255) + 1, 0);
            /* 0x01FF to 0x3FFF */
        } else if (c < 1024) {
            return f = new Color(255, (((c - 512) * 63) / 511) + 64, 0);
            /* 0x40FF to 0x7FFF */
        } else if (c < 2048) {
            return f = new Color(255, (((c - 1024) * 63) / 1023) + 128, 0);
            /* 0x80FF to 0xBFFF */
        } else if (c < 4096) {
            return f = new Color(255, (((c - 2048) * 63) / 2047) + 192, 0);
            /* 0xC0FF to 0xFFFF */
        }
        return f = new Color(255, 255, 0);
    }


    public static double[] quad(double a, double b) {


        double z = Math.pow(a, 2) - Math.pow(b, 2);
        double z1 = 2 * a * b;


        double z2[] = {z, z1};
        return z2;
    }


    public int funz(double a, double b) {
        double re = a, co = b;
        a = 0;
        b = 0;
        int c = 0;
        while (Math.sqrt(Math.pow(a, 2) + Math.pow(b, 2)) < 2 && c < ite) {


            double v[] = quad(a, b);
            double z1 = (v[0] + re);
            double z2 = (v[1] + co);


            a = z1;
            b = z2;
            c++;
        }
        return c;
    }
    Scanner in = new Scanner(System.in);


    public final int ite = Integer.parseInt(in.next());
    public static final int WIDTH = 2000;
    public static final int HEIGHT = 2000;
    int w = WIDTH / 2;


    int h = HEIGHT / 2;


    public void paint(Graphics g) {
    	
    	
        super.paint(g);
        
        Color [] colore=new Color[16];
        colore[0]=new Color(66, 30, 15);
        colore[1]=new Color(25, 7, 26);
        colore[2]=new Color(9, 1, 47);
        colore[3]=new Color(4, 4, 73);
        colore[4]=new Color(0, 7, 100);
        colore[5]=new Color(12, 44, 138);
        colore[6]=new Color(24, 82, 177);
        colore[7]=new Color(57, 125, 209);
        colore[8]=new Color(134, 181, 229);
        colore[9]=new Color(211, 236, 248);
        colore[10]=new Color(241, 233, 191);
        colore[11]=new Color(248, 201, 95);
        colore[12]=new Color(255, 170, 0);
        colore[13]=new Color(204, 128, 0);
        colore[14]=new Color(153, 87, 0);
        colore[15]=new Color(106, 52, 3);
        
        
        
        Color bo;


        for (int i = -h; i < h; i++) {
            for (int y = -w; y < w; y++) {
                double a = (double) i / (h / 2);
                double b = (double) y / (w / 2);
                int c = funz(a, b);
                if (c == ite) {


                    g.drawLine(i + h, y + w, i + h, y + w);
                    g.setColor(Color.black);
                } else {
                    g.setColor(colore[c%16]);
                    g.drawLine(i + h, y + w, i + h, y + w);


                }


            }
        }


    }
    public PixelCanvas()
{
    setSize(WIDTH,HEIGHT);
}


    public static void main(String[] args) {
        System.out.println("Inserire numero di iterzioni");


        JPanel jp = new JPanel();
        
        JScrollPane pane = new JScrollPane(new PixelCanvas(), JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        JFrame frame = new JFrame();
		
	frame.setSize(WIDTH, HEIGHT);
       frame.setContentPane(pane);


        


        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


        
        
        frame.setVisible(true);


    }
}