extended JPanel is empty

Hi,
I made a extended JPanel, but when i call on it in another class the panel shows but its empty... This is my code:

Code :

---

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class FindPanel extends JPanel
{ 
    JRadioButton biologyClass = new JRadioButton("Biology");
    ...make a radiobutton for each subject
 
    ButtonGroup classButtonGroup = new ButtonGroup();
    public void classesJPanel() {
        //add to button group
        classButtonGroup.add(biologyClass);
        ... add all the subjects to buttongroup
        //add to panel
        add(biologyClass);
        ...add all the subjects
        }
 
 
 
}

---

when i call on the code this is what i am using:

Code :

---

FindPanel jPanel1 = new FindPanel();

---

Thanks
Joel

I should also point out that im trying to call it in an applet. I called it in a normal JFrame and it worked fine, it just doesnt like the applet...

You do not have a constructor for your FindPanel Class. You need an overide constructor

How do i make an override constructor? What is it exactly?

JPanel is your superclass, in this case, so you need to insert the code...

Code :

---

super(String title)
 
//title is what the dialog box will be named in its title bar

---

...before your other code.

You also need to surround everything you have so far except the class name in...

Code :

---

public FindPanel() {
//your other code here
}

---

So, when it's all put together, the end result should be something like this:

Code :

---

public class FindPanel extends JPanel
{
   public FindPanel()
   {
 
      super(String title)
      //Note that you will not actually type "String title"; instead you
      //should type what you want the dialog to be titled when you open it
 
      //Put all your other code here, like the JRadioButton and ButtonGroup, etc.
      //Don't include the "public void classesJPanel()" part, just remove those brackets
      //The "super" constructor already creates a JPanel, and you're just customizing it
 
   }
}

---

Hopefully I got my meaning through... Sorry if it's unclear.