Vẽ từng điểm từ file

package pixelcanvas;

import java.awt.Canvas;
import java.awt.Color;
import java.awt.Graphics;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.Random;

import javax.swing.JFrame;

public class PixelCanvas extends Canvas {
    private static final int WIDTH = 800;
    private static final int HEIGHT = 20000;
    private static final Random random = new Random();

    @Override
    public void paint(Graphics g) {
        super.paint(g);

        try {
            String sCurrentLine;
            String temp;
            // sua lai duong dai file pairs theo nhu tren may tinh cua ban
            BufferedReader br = new BufferedReader(new FileReader("/Users/thieumao/Desktop/pairs"));
            while ((sCurrentLine = br.readLine()) != null) {
//                System.out.println(sCurrentLine);
                String[] array = sCurrentLine.split(" ");
                System.out.println("x="+array[0]+"y="+array[1]);
                int x = Integer.parseInt(array[0]);
                int y = Integer.parseInt(array[1]);
                g.setColor(oneColor());
                g.drawLine(x, y, x, y);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private Color oneColor() {
        return new Color(0, 0, 0);
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setSize(WIDTH, HEIGHT);
        frame.add(new PixelCanvas());
        frame.setVisible(true);
    }
}