Applet program not working

Question

Hi
i visited ur site and came to know that we can run our program through appletviewer as well .I have made one program but im not able to run it neither from appletviewer nor from html.
While running from appletviewer im getting response applet not initialized but at the same time when im running some other program from appletviewer im able to run it .
I am hereby sending my program alongwith plz chek and do let me know how to solve my problem.
import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
class panel1 extends Panel
CheckboxGroup cbg;
Checkbox c1,c2,c3;
TextField t1;
panel1()
cbg=new CheckboxGroup();
c1=new Checkbox("dish1",false,cbg);
add(c1);
c2=new Checkbox("dish2",false,cbg);
add(c2);
c3=new Checkbox("dish3",false,cbg);
add(c3);
t1=new TextField(20);
add(t1);
class panel2 extends Panel
Label l1,l2,l3,l4;
Checkbox cb1,cb2,cb3,cb4;
panel2()
cb1=new Checkbox();
add(cb1);
l1=new Label("veg burger");
add(l1);
cb2=new Checkbox();
add(cb2);
l2=new Label("patties");
add(l2);
cb3=new Checkbox();
add(cb3);
l3=new Label("french fries");
add(l3);
cb4=new Checkbox();
add(cb4);
l4=new Label("cold drink");
add(l4);
class app4 extends Applet implements ItemListener
panel1 p1;
panel2 p2;
public void init()
p1=new panel1();
add(p1);
p2=new panel2();
add(p2);
p1.c1.addItemListener(this);
p1.c2.addItemListener(this);
p1.c3.addItemListener(this);
public void itemStateChanged(ItemEvent e)
if (e.getItemSelectable()==p1.c1)
p2.cb1.setState(true);
p2.cb2.setState(false);
p2.cb3.setState(false);
p2.cb4.setState(true);
p1.t1.setText("price:250");
if (e.getItemSelectable()==p1.c2)
p2.cb1.setState(false);
p2.cb2.setState(true);
p2.cb3.setState(false);
p2.cb4.setState(true);
p1.t1.setText("price:350");
if (e.getItemSelectable()==p1.c3)
p2.cb1.setState(false);
p2.cb2.setState(false);
p2.cb3.setState(true);
p2.cb4.setState(true);
p1.t1.setText("price:450");
/*<applet code="app4.class"width=200 height=200>
</applet> */

Answer 1

import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
public class app4 extends Applet implements ItemListener {
    panel1 p1;
    panel2 p2;
    public void init() {
        p1 = new panel1();
        add(p1);
        p2 = new panel2();
        add(p2);
        p1.c1.addItemListener(this);
        p1.c2.addItemListener(this);
        p1.c3.addItemListener(this);
    public void itemStateChanged(ItemEvent e) {
        if (e.getItemSelectable() == p1.c1) {
            p2.cb1.setState(true);
            p2.cb2.setState(false);
            p2.cb3.setState(false);
            p2.cb4.setState(true);
            p1.t1.setText("price:250");
        if (e.getItemSelectable() == p1.c2) {
            p2.cb1.setState(false);
            p2.cb2.setState(true);
            p2.cb3.setState(false);
            p2.cb4.setState(true);
            p1.t1.setText("price:350");
        if (e.getItemSelectable() == p1.c3) {
            p2.cb1.setState(false);
            p2.cb2.setState(false);
            p2.cb3.setState(true);
            p2.cb4.setState(true);
            p1.t1.setText("price:450");
    class panel1 extends Panel {
        CheckboxGroup cbg;
        Checkbox c1, c2, c3;
        TextField t1;
        panel1() {
            cbg = new CheckboxGroup();
            c1 = new Checkbox("dish1", false, cbg);
            add(c1);
            c2 = new Checkbox("dish2", false, cbg);
            add(c2);
            c3 = new Checkbox("dish3", false, cbg);
            add(c3);
            t1 = new TextField(20);
            add(t1);
    class panel2 extends Panel {
        Label l1, l2, l3, l4;
        Checkbox cb1, cb2, cb3, cb4;
        panel2() {
            cb1 = new Checkbox();
            add(cb1);
            l1 = new Label("veg burger");
            add(l1);
            cb2 = new Checkbox();
            add(cb2);
            l2 = new Label("patties");
            add(l2);
            cb3 = new Checkbox();
            add(cb3);
            l3 = new Label("french fries");
            add(l3);
            cb4 = new Checkbox();
            add(cb4);
            l4 = new Label("cold drink");
            add(l4);
}Hope that Helps