Importavimas iš tekstinio failo grafikui

Sveiki, reikia padaryti, kad programa nuskaitytų tekstinį failą ir nubrėžtų grafą, kaip padarytų, kad programa braižytų pagal tekstinį failą?

import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;

public class GraphingData extends JPanel {
   int[] data = {
       21, 14, 18, 03, 86, 88, 74, 87, 54, 77,
       61, 55, 48, 60, 49, 36, 38, 27, 20, 18
   };
   final int PAD = 20;

   protected void paintComponent(Graphics g) {
       super.paintComponent(g);
       Graphics2D g2 = (Graphics2D)g;
       g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                           RenderingHints.VALUE_ANTIALIAS_ON);
       int w = getWidth();
       int h = getHeight();
       // Draw ordinate.
       g2.draw(new Line2D.Double(PAD, PAD, PAD, h-PAD));
       // Draw abcissa.
       g2.draw(new Line2D.Double(PAD, h-PAD, w-PAD, h-PAD));
       double xInc = (double)(w - 2*PAD)/(data.length-1);
       double scale = (double)(h - 2*PAD)/getMax();
       // Mark data points.
       g2.setPaint(Color.red);
       for(int i = 0; i < data.length; i++) {
           double x = PAD + i*xInc;
           double y = h - PAD - scale*data[i];
           g2.fill(new Ellipse2D.Double(x-2, y-2, 4, 4));
       }
   }

   private int getMax() {
       int max = -Integer.MAX_VALUE;
       for(int i = 0; i < data.length; i++) {
           if(data[i] > max)
               max = data[i];
       }
       return max;
   }

   public static void main(String[] args) {
       JFrame f = new JFrame();
       f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       f.add(new GraphingData());
       f.setSize(400,400);
       f.setLocation(200,200);
       f.setVisible(true);
   }
}

Tai pridedi duomenų skaitymą į masyvą ir viskas.

import java.awt.*;
import java.awt.geom.*;
import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import javax.swing.*;

public class GraphingData extends JPanel {
   static int[] data = new int[100];
   final int PAD = 20;
   static int dydis = 0;

   protected void paintComponent(Graphics g) {
       super.paintComponent(g);
       Graphics2D g2 = (Graphics2D)g;
       g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                           RenderingHints.VALUE_ANTIALIAS_ON);
       int w = getWidth();
       int h = getHeight();
       // Draw ordinate.
       g2.draw(new Line2D.Double(PAD, PAD, PAD, h-PAD));
       // Draw abcissa.
       g2.draw(new Line2D.Double(PAD, h-PAD, w-PAD, h-PAD));
       double xInc = (double)(w - 2*PAD)/(dydis-1);
       double scale = (double)(h - 2*PAD)/getMax();
       // Mark data points.
       g2.setPaint(Color.red);
       for(int i = 0; i < dydis; i++) {
           double x = PAD + i*xInc;
           double y = h - PAD - scale*data[i];
           g2.fill(new Ellipse2D.Double(x-2, y-2, 4, 4));
       }
   }

   private int getMax() {
       int max = -Integer.MAX_VALUE;
       for(int i = 0; i < dydis; i++) {
           if(data[i] > max)
               max = data[i];
       }
       return max;
   }

private static void readData() throws FileNotFoundException, IOException {
	File file = new File("c:/duomenys.txt");
	FileInputStream fis = new FileInputStream(file);
    BufferedInputStream bis = new BufferedInputStream(fis);
    DataInputStream dis = new DataInputStream(bis);
	while (dis.available() != 0) {
		data[dydis] = Integer.parseInt(dis.readLine());
		dydis++;
	}
	fis.close();
	bis.close();
	dis.close();
}

   public static void main(String[] args) {
   	try {
		readData();
	} catch (FileNotFoundException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (IOException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
       JFrame f = new JFrame();
       f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       f.add(new GraphingData());
       f.setSize(400,400);
       f.setLocation(200,200);
       f.setVisible(true);
   }
}

Tie kvaili tarpai vietoj tab sudarke koda, bet gali pats patvarkyti, as turiu begti :)

duomenys.txt