public class Body_mass extends Applet { //opredelenie peremennyh dlya elementov upravleniya
    Label l_height, l_weight;  
    TextField t_height, t_weight; 
    Button b_Send;          
    TextArea t_output;

class Sniffer1 implements ActionListener { // class Sniffer opredelyaetsya ot interfeisa ActionListener

        public void actionPerformed(ActionEvent e) 
        {
            String title;
            String tmp;
            double height, weight, index;

            title = e.getActionCommand(); 

            if (title.equals("Count Body Mass-index.."));
            {

<applet code="Bodymass" archive="Bodymass.jar" width ="800" height = "600"> 
</applet>