Really basic Java Swing question

Hi,
I'm really stuck, cannot seem to compile anything. I'm using the newest SDK, 1.4 or whatever. Can someone please briefly explain how they'd compile and run a swing program using MSDOS Prompt. Thanks.
Nick

Here be an empty swing frameimport java.awt.*;
import javax.swing.*;
public class MyJFrame extends JFrame {
  public MyJFrame() {
      super("My first JFrame");
      Container c  = getContentPane();
      JPanel panel = new JPanel();     
      c.add(panel);
  public static void main(String[] args) {
    MyJFrame frame = new MyJFrame();
    frame.setSize(200,200);
    frame.setLocation(200, 300);
    frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
    frame.setVisible(true);
}You compile and run it in the same way as any DOS based command line program.

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    create or replace procedure demo1_set_lower as
    begin
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