import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Points extends JPanel {
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
g2d.setColor(Color.red);
for (int i = 0; i <= 100000; i++) {
Dimension size = getSize();
int w = size.width ;
int h = size.height;
Random r = new Random();
int x = Math.abs(r.nextInt()) % w;
int y = Math.abs(r.nextInt()) % h;
g2d.drawLine(x, y, x, y);
}
}
public static void main(String[] args) {
Points points = new Points();
JFrame frame = new JFrame("Points");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(points);
frame.setSize(250, 200);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}