Button group and 'Other Components'

Question

Hullo,
I am trying to insert in the gui a couple of exclusive buttons, in the sense that when one is on the other becomes off.
I thought the component useful for that was 'Button Group'. Though when I insert it, it end up in the Other Components session and does not show in the main panel. Normal independent buttons work regularly by simply laying them in the panel.
Thanks,
Fabrizio

Answer 1

In fact I found an example at:
http://java.sun.com/docs/books/tutorial/uiswing/examples/components/RadioButtonDemoProject/src/components/RadioButtonDemo.java
I managed to create a package and a class inside and to have it compiled - a feat to me as I started touching Java yesterday :-)
Still I have no cue about how to invoke it from the main package. The example fares to dispatchers and the like, what I do not need presently as I only need to get the clicked button at a later time rather that invoking an event at the click.
Basically how do I simply instantiate the class in the other package? Should I import the other file and how?
This is what I tried that gives error lamenting it does not find the symbol and location class.
This is the failed attempt:
public static void main(String[] args) {
myRadioButton RadioButtonDemo = new RadioButtonDemo;
Thanks again.
Fabrizio