program in java - draw various shapes

import java.awt.*;
class draw extends Frame
{
    public static void main(String args[])
    {
        draw f=new draw();
        f.setTitle("My Name");
        f.setSize(500,500);
        f.setVisible(true);
        //f.show();
    }
    public void paint(Graphics g)
    {
        int x[]={50,100,50,200};
        int y[]={50,150,250,300};

        g.drawLine(100,100,300,300);
        g.drawOval(300,100,50,100);
        g.drawOval(300,100,50,50);
        g.drawRect(50,50,100,100);
        g.drawRoundRect(200,300,70,70,20,20);

        g.drawArc(200,400,30,30,0,180);
        g.drawArc(200,400,30,30,0,-180);

        g.drawArc(300,410,30,30,0,90);
        g.drawArc(300,410,30,30,90,90);
        g.drawArc(300,410,30,30,-90,90);
        g.drawArc(300,410,30,30,-90,-90);
        g.drawPolygon(x,y,4);
    }
}