What does "java.awt.Butto n cannot be cast to javax.swing.JCo mboBox" mean?

[HaifaCarina]

i have this unfinished java program and i can't figure out what is the problem..

please help...

/**
* @(#)Answer3.jav a
*
*
* @author
* @version 1.00 2008/1/17
*/
import javax.swing.*;
import java.awt.*;
import java.applet.*;
import java.awt.event. *;
import javax.swing.bor der.*;

public class Answer3 extends Applet implements ActionListener {

//declaration of instance variables
CheckboxGroup radioGroup2;
TextField tf1, tf2, tf3;
JComboBox flavorsCombo;
Button addPizza;
Checkbox Personal, Regular, Family;
Checkbox Bacon, Beef, Ham, Pepperoni, Onions,Pineappl e, Cheese, Mushroom;
int pricePersonal = 150,
priceRegular = 250,
priceFamily = 400,
priceTopping = 20,
total = 0;

public void init() {

JPanel panel = new JPanel();
//displays the name of the program
JLabel programName = new JLabel (" Pizza Station Ordering Software ");
programName.set Font (new Font ("Arial", Font.BOLD, 18));
panel.add(progr amName);
panel.setBorder (new EtchedBorder()) ;
panel.setLayout (new GridLayout(1,5, 20,50));
add(panel);

JPanel panel1 = new JPanel();
//initializes the JCombobox
flavorsCombo = new JComboBox();
flavorsCombo.ad dItem("Hawaiian ");
flavorsCombo.ad dItem("Mozzarel la");
flavorsCombo.ad dItem("Pepperon i");
panel1.add(flav orsCombo);
flavorsCombo.ad dActionListener (this);
panel1.setBorde r(new TitledBorder(ne w EtchedBorder(), "Pizza Flavors"));
add(panel1);

//declares a new category of CheckboxGroup
CheckboxGroup radioGroup1 = new CheckboxGroup() ;

//initializes the radio buttons for radioGroup1
Personal = new Checkbox("Perso nal",radioGroup 1,true);
Regular = new Checkbox("Regul ar",radioGroup1 ,false);
Family = new Checkbox("Famil y",radioGroup1, false);

//initializes the radio buttons for radioGroup2
Bacon = new Checkbox("Bacon ",radioGroup2,f alse);
Beef = new Checkbox("Beef ",radioGroup2,f alse);
Ham = new Checkbox("Ham ",radioGroup2,f alse);
Pepperoni = new Checkbox("Peppe roni ",radioGroup2,f alse);
Onions = new Checkbox("Onion s ",radioGroup2,f alse);
Pineapple = new Checkbox("Pinea pple ",radioGroup2,f alse);
Cheese = new Checkbox("Chees e ",radioGroup2,f alse);
Mushroom = new Checkbox("Mushr oom ",radioGroup2,f alse);

//TitledBorder which displays the radioButtons of CheckboxGroup1
JPanel panel2 = new JPanel();
panel2.add(Pers onal);
panel2.add(Regu lar);
panel2.add(Fami ly);
panel2.setBorde r(new TitledBorder(ne w EtchedBorder(), "Pizza Flavors"));
add(panel2);

//TitledBorder which displays the radioButtons of CheckboxGroup2
JPanel panel3 = new JPanel();
panel3.add(Baco n);
panel3.add(Beef );
panel3.add(Ham) ;
panel3.add(Pepp eroni);
panel3.add(Onio ns);
panel3.add(Pine apple);
panel3.add(Chee se);
panel3.add(Mush room);
panel3.setBorde r(new TitledBorder(ne w EtchedBorder(), "ExtraToppings" ));
panel3.setLayou t(new GridLayout(3,3, 10,2));
add(panel3);

JPanel panel4 = new JPanel();

JPanel panel5 = new JPanel();
JLabel quantity = new JLabel ("Quantity ");
quantity.setFon t (new Font ("Arial", Font.BOLD, 12));
panel4.add(quan tity);
//initializes the TextField
tf1 = new TextField(5);
tf1.setEditable (true);
panel5.add(tf1) ;
panel5.setBorde r(new EmptyBorder(2,1 0,2,2));
panel4.add(pane l5);

JPanel panel6 = new JPanel();

//initializes the addPizza button
addPizza = new Button("Add Pizza to Order List");
addPizza.addAct ionListener(thi s);
panel6.add(addP izza);
panel6.setBorde r(new EmptyBorder(2,2 ,2,24));
panel4.add(pane l6);
panel4.setBorde r(new EtchedBorder()) ;
add(panel4);

//TitledBorder which displays the JTextArea
JPanel panel7 = new JPanel();

//initializes the JTextArea
JTextArea pizzaOrders = new JTextArea(8,28) ;
pizzaOrders.set Editable(false) ;
panel7.add(pizz aOrders);
panel7.setBorde r(new TitledBorder(ne w EtchedBorder(), "Pizza Orders"));
add(panel7);

JPanel panel8 = new JPanel();

//initializes the name entry
JLabel name = new JLabel("Name ");
name.setFont(ne w Font("Arial",Fo nt.BOLD,12));
panel8.add(name );
tf2 = new TextField(19);
panel8.add(tf2) ;
panel8.setBorde r(new EtchedBorder()) ;
add(panel8);

JPanel panel9 = new JPanel();


JLabel total = new JLabel("Total ");
total.setFont(n ew Font("Arial",Fo nt.BOLD,12));
panel9.add(tota l);
tf3 = new TextField(5);
tf3.setEditable (false);
panel9.add(tf3) ;
panel9.setBorde r(new EtchedBorder()) ;
add(panel9);

}


public void actionPerformed (ActionEvent e){
JComboBox cb = (JComboBox)e.ge tSource();
String flavorPizza = (String)cb.getS electedItem();



if (e.getSource() == addPizza)
JOptionPane.sho wMessageDialog( null,"NONSENSE" );



}

}

[JosAH]

I'm sure your compiler mentioned a line number when it bumped in to that problem.
If/when you want your problem solved on this forum please supply us with all the
information you received when you hit the problem. A quick hint: you are messing
with AWT objects as well as Swing objects and that is generally not done. A
Button in the AWT library most certainly is not a Swing JComboBox component.
You try to treat one as the other somewhere in your code.

kind regards,

Jos

[HaifaCarina]

I'm sure your compiler mentioned a line number when it bumped in to that problem.
If/when you want your problem solved on this forum please supply us with all the
information you received when you hit the problem. A quick hint: you are messing
with AWT objects as well as Swing objects and that is generally not done. A
Button in the AWT library most certainly is not a Swing JComboBox component.
You try to treat one as the other somewhere in your code.

kind regards,

Jos

Thanks Jos!I did some confusing move but i did finish this program...! Congratulations self!