import javax.swing.JFrame;
import java.awt.Canvas;
import java.awt.Graphics;
import java.awt.Color;
import java.awt.Polygon;

class Program01 extends JFrame {
	RajzVaszon rajzVaszon = new RajzVaszon();
	Program01() {
		add(rajzVaszon);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setSize(800, 600);
		setVisible(true);
	}
	public static void main(String[] args) {
		new Program01();
	}
}
class RajzVaszon extends Canvas {
	public void paint(Graphics g) {
		g.setColor(Color.red);
		
		Polygon poly = new Polygon();
		poly.addPoint(200, 200);
		poly.addPoint(250, 250);
		poly.addPoint(250, 300);
		g.fillPolygon(poly);
	}
}