Hello guys. I just wrote my first java program and i have a couple of
questions and a problem. I would be glad if someone can give me a
hand.

The questions :
 1. How do i pack everything into i nice executable file for others
to run without the need to open a cmd prompt and typing java ... and
so on ?
 2. How do you guys do when your looking for a command. Is there some
kind of registry online, or do you have books or do you just know it
all from the getgo :) ?

The problem is that, while the compailer doesn't complain, i still get
an error at runtime. The error staits

Exception in thread "main" java.lang.NullPointerException
       at DiveLog.DiveLog.populateMettoMenu(DiveLog.java:76)
       at DiveLog.DiveLog.<init>(DiveLog.java:38)
       at DiveLog.DiveLog.main(DiveLog.java:15)
Press any key to continue . . .

and i cant get the program running.

The source looks like this

package DiveLog;

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

public class Metto
{
    private JFrame mettoFrame;
    private JTabbedPane mettoPane;

    public static void main(String[] args)
        {
            Metto go = new Metto();
        }

    public Metto()
    {

        JFrame mettoFrame = new JFrame("Metto ligger långt efter");

        mettoFrame.addWindowListener(new WindowAdapter()
        {
            public void windowClosing(WindowEvent e)
            {
                System.exit(0);
            }
        });

        mettoPane = new JTabbedPane(SwingConstants.RIGHT);
        mettoPane.setBackground(Color.blue);
        mettoPane.setForeground(Color.white);
        populateMettoPane();

        populateMettoMenu();

        mettoFrame.getContentPane().add(mettoPane);

        mettoFrame.pack();
        mettoFrame.setSize(750, 650);
        mettoFrame.setBackground(Color.white);
        mettoFrame.setVisible(true);

    }

    private void populateMettoPane()
    {
        mettoPane.addTab("Tryck här",
                        null,
                        new press1(),
                        "Det här va inte så svårt");
        mettoPane.addTab("Eller här",
                        null,
                        new press2(),
                        "Inte det här häller");
    }

    private void populateMettoMenu()
    {
        JMenuBar mb = new JMenuBar();
        JMenu menu = new JMenu("File");
        JMenuItem item = new JMenuItem("Exit");
        item.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                System.exit(0);
            }
        });
        menu.add(item);
        mb.add(menu);
        mettoFrame.setJMenuBar(mb);

    }

    public class press1 extends JPanel
    {
    }

    public class press2 extends JPanel
    {
    }

}

Thx in advance for any help you guys can give me. Mohamed Haidar.