Allowing the User To Draw Lines, Rectangles and Ovals

import java.applet.*;
import java.awt.event.*;
import java.awt.*;
/*<applet code="Appq12.class" height=310 width=400>
</applet>*/
public class Appq12 extends Applet implements ActionListener
{
 Button b[]=new Button[10];
 int in;
 public void init()
 {
  b[0]=new Button("Line");
  b[1]=new Button("Rectangle");
  b[2]=new Button("FilledRectangle");
  b[3]=new Button("RoundedRectangle");
  b[4]=new Button("FilledRoundedRectangle");
  b[5]=new Button("Oval");
  b[6]=new Button("FilledOval");
  b[7]=new Button("Arc");
  b[8]=new Button("FilledArc");
  b[9]=new Button("Polygon");
  for(int i=0;i<10;i++)
  {
   add(b[i]);
   b[i].addActionListener(this);
  }
 }
 public void actionPerformed(ActionEvent ae)
 {
  for(int j=0;j<10;j++)
  {
   if(ae.getSource()==b[j])
   {
    in=j+1;
    break;
   }
  }
  repaint();
 }
 public void paint(Graphics g)
 {
  if(in==1)
   g.drawLine(150, 150, 250, 300);
  if(in==2)
   g.drawRect(150, 150, 60, 50);
  if(in==3)
   g.fillRect(150,150, 60, 50);
  if(in==4)
   g.drawRoundRect(150, 150, 60, 50, 15, 15);
  if(in==5)
   g.fillRoundRect(150, 150, 60, 50, 15, 15);
  if(in==6)
   g.drawOval(150, 150, 60, 50);
  if(in==7)
   g.fillOval(150, 150, 60, 50);
  if(in==8)
   g.drawArc(150, 150, 60, 50, 0, 75);
  if(in==9)
   g.fillArc(150, 150, 60, 50, 0, 75);
  if(in==10)
  {
   int xpoints[] = {50, 200,250, 250,200};
   int ypoints[] = {250, 200,250, 300,300};
   int num = 5;
   g.drawPolygon(xpoints, ypoints, num);
  }
 }
}