How would I get rid of the spacing to the left and right of the text of
a JButton?

I have a button with the text "Lookup" like this:

 private final JButton m_lookupButton = new JButton();
 private final AbstractAction m_lookupAction =
   new AbstractAction("Lookup") {
     public void actionPerformed(ActionEvent evt) {
        lookup();
     }
   };
   m_lookupButton.setAction(m_lookupAction);
   final JPanel buttons=new JPanel();
   buttons.add(m_lookupButton);

but when I run the program, the button appears much wider than its text
with a lot of space to the left and right of the text.

If I try to make the button narrower like this:

    m_lookupButton.setIconTextGap(0);
    m_lookupButton.setPreferredSize
       (new Dimension
          (m_lookupButton.getPreferredSize().width-1,
m_lookupButton.getPreferredSize().height));

then the text is shown as "Look..."

Any answers gratefully received :)
/Martin