Trying to create a simple example. Need Help!

I'm trying to create a very simlpe examlpe using Swing components to illustrate a MVC architecture.
I have a JFrame containing a JTree and a JButton.
What I'd like to happen is when I click the JButton the JTree model is changed in some fashion and the the view is refreshed due to the models change.
If anyone out there has a simple example of any MVC architecture involving Swing components I'd love to see it.
Thx

Sure, look at any of the Sun tutorials. For example, look in your API documentation for JTree; it has a link to a tutorial about how to use JTree.

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>
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Message was edited by: EZ Jim
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Help, I am killing myself trying to do this and I need help ASAP

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Use JOptionPane to take inputs from the user and display the results.
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import javax.swing.*;
import java.text.*;
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{     //Start
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for (int i=0; i<price.length(); i++)
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float fPrice = Float.parseFloat(price);
float fPayment = Float.parseFloat(payment);
float fChange = fPayment-fPrice;
DecimalFormat df = new DecimalFormat ("#.00");
JOptionPane.showMessageDialog (null, "You item costs "+price+" and you payed "+payment+" and your change will be "+ df.format (fChange));
This is where I don't know what to put
     System.exit(0);
     }     //End Main
     }     //End
I am begging for help.

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