I would appreciate some urgent assistance with this simple code.

When it run it displays a blank frame. What do I need to do to get the
JTable to display?

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;

public class RunFileMatcher extends JFrame {

  RunFileMatcher() {
     JFrame frame = new JFrame("MatchTable");
     frame.setSize(600,400);

     String[] columnNames = {"File", "Size"};
     String dataValues[][] =   {
        { "A", "234" },
        { "B", "43" },
        { "C", "89.2" },
        { "D", "9033" }
     };

     JTable table = new JTable(dataValues,columnNames);
     getContentPane().add(new JScrollPane(table), "Center");

     frame.setVisible( true );
     frame.setDefaultCloseOperation( WindowConstants.EXIT_ON_CLOSE );

  }
}