I'm not sure why my JTable is not showing any headings:

import javax.swing.JOptionPane;
import javax.swing.JTable;

public class Currency {
  public static void editCurrencies(){
    String[] headings = new String[] {"Code", "Rate"};
    Object[][] data = new Object[][] {
      {"AUD", new Float(2.6124)},
      {"EUR", new Float(1.4961)},
      {"GBP", new Float(1.0000)},
      {"USD", new Float(1.8463)}
    };
    JTable table = new JTable(data, headings);
    JOptionPane.showConfirmDialog(
      MyApp.frame,
      table,
      "Currencies and exchange rates",
      JOptionPane.OK_CANCEL_OPTION,
      JOptionPane.PLAIN_MESSAGE,
      null
    );
  } // method editCurrencies
} // class Currency

java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode)

I'm running from Eclipse 3.1.0 where the Java Build Path includes
jre1.5.0_06

I was expecting column headings in the table, can anyone point out what
I am doing wrong?