public void paint(Graphics g) { int[] x = new int[]{100,200,300,400}; int[] y = new int[]{400,300,300,100};
g.drawPolygon (x, y, x.length);
}
}
public class DrawPolygon { public static void main(String[] a) {
JFrame window = new JFrame();
window.setBounds(30, 30, 300, 300);
window.getContentPane().add(new MyCanvas());
window.setVisible(true);
}
}