HELP (swing)

Question

Hi.
I don?t speak( or write)English very good so i?ll be quick.
My program will display 4 "panels". (it�s like a test for your bad habits)
On the first, you ?ll input some general facs like name, age, etc(in JTextfields).
On the second, third, and fourth, you?ll choose from 3 JRadioButtons ( those buttons define parametres; if you smoke, drink alcohol, and if you do excercise or you don�t).
there?s going to be a "next" button on all the swing program, this button will change the differents "panels"
but THAT?S the problem. The actionListener will react to a button click, and it?ll change to the next panel.
Here is the code:
(It has some holes, but they aren�t very important, the really problem is changing the panels by clickin� the next button)
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class look{
public void Metal(){
try{
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}catch(Exception e) {}
class Program extends JPanel implements ActionListener {
public JFrame Frame;
public JPanel Datos;
public JPanel Smoke;
public JPanel Drink;
public JPanel Act_fis;
public JButton next;
public ButtonGroup grupo;
public boolean bol=true;
look luk=new look();
public void Datos_generales () {
Datos= new JPanel();
Datos.setLayout(new GridLayout(0,2,30,30));
next = new JButton("Continuar");
next.addActionListener(this);
JTextField nombre;
JLabel nombre1;
JTextField edad;
JLabel edad1;
JTextField peso;
JLabel peso1;
JTextField altura;
JLabel altura1;
nombre1=new JLabel("Nombre: ");
nombre=new JTextField(5);
edad1=new JLabel("Edad: " );
edad=new JTextField(5);
peso1=new JLabel("Peso:" );
peso=new JTextField(5);
altura1=new JLabel("Altura:" );
altura=new JTextField(5);
Frame=new JFrame("Factores de riesgo");
Datos.add(nombre1);
Datos.add(nombre);
Datos.add(edad1);
Datos.add(edad);
Datos.add(peso1);
Datos.add(peso);
Datos.add(altura1);
Datos.add(altura);
Frame.getContentPane().add(Datos,BorderLayout.NORTH);
Frame.getContentPane().add(next,BorderLayout.SOUTH);
Frame.pack();
Frame.setVisible(true);
Frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
public void Tobacco () {
Smoke= new JPanel();
Smoke.setLayout(new GridLayout(0,2,80,40));
JRadioButton params[]= new JRadioButton[3];
ButtonGroup grupo= new ButtonGroup();
params [0]= new JRadioButton("1 --> 14");
params[0].setActionCommand("1");
params [1]=new JRadioButton("14--25");
params [1].setActionCommand("2");
params [2]= new JRadioButton("mas de 25");
params[2].setActionCommand("3");
for(int i=0; i<3; i++){
grupo.add(params);
public void Alcohol () {
Drink=new JPanel();
Drink.setLayout(new GridLayout(0,2,20,10));
JRadioButton params2[]= new JRadioButton[3];
ButtonGroup grupo2= new ButtonGroup();
params2 [0]= new JRadioButton("1 --> 14");
params2 [0].setActionCommand("12");
params2 [1]=new JRadioButton("14--25");
params2 [1].setActionCommand("22");
params2 [2]= new JRadioButton("mas de 25");
params2 [2].setActionCommand("32");
for(int i=0; i<3; i++){
grupo2.add(params2[i]);
public void Act_fisica (){
Act_fis=new JPanel();
Drink.setLayout(new GridLayout(0,2,20,10));
JRadioButton params3[]= new JRadioButton[3];
ButtonGroup grupo3= new ButtonGroup();
params3 [0]= new JRadioButton("1 --> 14");
params3 [0].setActionCommand("13");
params3 [1]=new JRadioButton("14--25");
params3 [1].setActionCommand("23");
params3 [2]= new JRadioButton("mas de 25");
params3 [2].setActionCommand("33");
for(int i=0; i<3; i++){
grupo3.add(params3[i]);
public void actionPerformed (ActionEvent event){
if()
public class Proyect3{
public static void main(String [] args){
look lk =new look();
lk.Metal();
Program prg=new Program();
String comando=prg.grupo.getSelection().getActionCommand();
ActionEvent(prg.next,1);
prg.Datos_generales();
So, that�s it.

Answer 1

1. Start with a JFrame
...public class myGrupos extends JFrame implements ActionListener{
2. Add the JPanels to a container
Container cont = getContentPane();
3. Add the JPanels to the 'cont'
cont.add(panel_1st);
if(event ' ' ' etc ) {
remove(panel_1st);
add~(panel_2nd);
validate();