[Albert]

The other style that Eric mentions would look like this, either gets the job done so it's really just a matter of preference:

Code:

public class Example implements ActionListener
{
    public Example()
    {
        JButton button = new JButton( "Example" );
        button.addActionListener( this );
    }

    public void actionPerformed( ActionEvent event ) {
        JOptionPane.showMessageDialog( null, "This is an example" ) ;
    }
}

Greetings

Albert