import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class Shop extends Applet
{
 Label labela,labelb;
 TextField tf;
 Button buttona;
 Checkbox check1,check2,check3;
 static int tv_price=0;
 static int icebox_price=0;
 static int air_price=0;
 public void init()
 {
 labela=new Label("select shop");
 labelb=new Label(" count");
 tf=new TextField(15);
 tf.setEditable(false);
 buttona=new Button("computer");
 check1=new Checkbox("tv 2100");
 check2=new Checkbox("icebox 2500");
 check3=new Checkbox("air_condition 1600");
 add(labela);
 add(check1);
 add(check2);
 add(check3);add(buttona);
 add(labelb);add(tf);
 HandleListener h1=new HandleListener();
 check1.addItemListener(h1);
 check2.addItemListener(h1);
 check3.addItemListener(h1);
 
 }
 private class HandleListener implements ItemListener
 {
  public void itemStateChanged(ItemEvent e)
  {
   if(e.getItemSelectable()==check1&&check1.getState()==true)
      tv_price=2100;
     else tv_price=0;
   if(e.getItemSelectable()==check2&&check2.getState()==true)
      icebox_price=2500;
      else icebox_price=0;
   if(e.getItemSelectable()==check3&&check3.getState()==true)
      air_price=1600;
      else air_price=0;
   HandleListener1 h2=new HandleListener1();
   buttona.addActionListener(h2);
   }
 }
 private class HandleListener1 implements ActionListener
 {
   public void actionPerformed(ActionEvent e)
   {
    if(e.getSource()==buttona)
    {
     //tf.getvalue(tv_price+icebox_price+air_price);
     int sum=tv_price+icebox_price+air_price;
     String str=String.valueOf(sum);
     tf.setText(str);
    }
   }
 }