How do I shutdown my program with a JButton ActionListener?

I have a button, and a buttonhandler(ActionEvent) for it. Now, I want to make it so that, when you click the button, your program shuts down. How would I go about doing this? My buttonhandler code:

class ButtonHandler implements ActionListener{
    public void actionPerformed( ActionEvent e){
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    }
}

So I basicly need to shutdown the whole JFrame.

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Your ButtonHandler would have a reference to the JFrame it's a member of and call JFrame.dispose();

class ButtonHandler implements ActionListener{
    final JFrame parent; 
    public ButtonHandler(JFrame p) { parent = p; }

    public void actionPerformed( ActionEvent e){
        parent.dispose();
    }
}

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If you are shutting down the entire program, you can use System.exit().