Two Classes and a Public Void!

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posted 21 years ago

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Ok for some reason i cant get this to work!
1. I have two panels classes, one for the radio buttons and the other for the checkboxes.
2. the second part is to calculate the choices.
what am i doing wrong, (with out the panels i can get it to work)
here is the code

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
 
public class testpanels extends Applet {
 
cbpanel_PizzaSize  Size_Panel;
cbpanel_PizzaIngredients Ingred_Panel;
 
TextField response;

public  void  init() {
//Layout off applet
setLayout ( new  GridLayout( 2,3));

//Size of Pizza Panel
Size_Panel = new cbpanel_PizzaSize();
add(Size_Panel);

//Ingredients choice panel
Ingred_Panel = new cbpanel_PizzaIngredients();
add(Ingred_Panel);
}
}
 
class cbpanel_PizzaSize extends Panel implements ItemListener{
CheckboxGroup  oneCBG;
Checkbox  Small, Medium, Large, SuperLarge;
 
cbpanel_PizzaSize() {
oneCBG = new CheckboxGroup();

Small = new Checkbox( " Small ",false,oneCBG);
Small.addItemListener(this);

Medium = new Checkbox( " Medium ",false,oneCBG);
//Medium.addItemListener(this);

Large = new Checkbox( " Large ",false,oneCBG);
//Large.addItemListener(this);

SuperLarge = new Checkbox( " SuperLarge ",false,oneCBG);
//SuperLarge.addItemListener(this);

add(Small);
add(Medium);
add(Large);
add(SuperLarge);
}
}
 
class cbpanel_PizzaIngredients extends Panel implements ItemListener {

Checkbox Pepporoni, Chilli, Anchovies,Ham, Mushrooms, Greenpeppers;
cbpanel_PizzaIngredients() {

Pepporoni = new Checkbox("Pepporoni");
add(Pepporoni);
Pepporoni.addItemListener(this);
 
Chilli = new Checkbox("Chilli");
add(Chilli);
//Chilli.addItemListener(this);
 
Ham = new Checkbox("Ham");
add(Ham);
//Ham.addItemListener(this);
 
Greenpeppers = new Checkbox("Greenpeppers");
add(Greenpeppers);
//Greenpeppers.addItemListener(this);
 
Mushrooms = new Checkbox("Mushrooms");
add(Mushrooms);
//Mushrooms.addItemListener(this);
 
Anchovies = new Checkbox("Anchovies");
add(Anchovies);
//Anchovies.addItemListener(this);
}
 
 
public void abstract itemStateChange (ItemEvent e) {
 
double total; // getting alot of 9999's and stuff 
                      // need to round off some how.

total=0;

//Radio Buttons
if(e.getItemSelectable() == Small);
total = 3.00;
//response.setText("� "+ total);
}
}

//An HTML file for this program could be as follows:
//<html>
//<body>
//<applet code = testpanels.class width = 300 height = 200>
//</applet>
//</body>
//</html>
[ February 25, 2004: Message edited by: Dirk Schreckmann ]

So Cold & So Outa Control

Layne Lund

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Posts: 3061

posted 21 years ago

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What does it do exactly that you define as "not working"? Please provide cocmpiler errors, if any, and describe what results you intend as well as what actually happens.
As an aside, typical Java variable names don't use the underscore character. You may want to read more about Java coding conventions. In particular, class names should start with an uppercase letter and used MixedCaps to seperate words in the name. Other identifiers (functions, variables, etc.) should begin with lower case. If you follow the conventions that other programmers are used to, it sure makes it easier for us to read your code, which also means we will be able to help you find solutions to your problems more quickly.
HTH
Layne

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Karis Brown

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Posts: 33

posted 21 years ago

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Ok I will modify! erm, also I get public void abstract itemStateChange (ItemEvent e) { error it asks for class or interface. like i was saying without the panels I can get it working, I also get itemListener problems as well, its all to confusing for me but its part of my degree so it has to be done. C++ is far more simpler!

So Cold & So Outa Control

Layne Lund

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Posts: 3061

posted 21 years ago

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Will you post the exact error messages you get and indicate which line each one refers to?
And if you think C++ is simpler, you really should try creating a GUI with it. You will soon change your mind.

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Don't get me started about those stupid light bulbs.