Is there an easy way to share a program?

[Darrin Altman]

I am still in the beginning stages of learning Java. I have a friend at work "math challenged" so I made this very basic little program and I would like to "export" the code so I can put on her computer and she can "run" it. Is there a simple way to do this? I tried to export an executable jar file from Eclipse but when I double click on it I get an error. Any help will be appreciated.

Here is the code for my program:

public class SplitCalculator extends Program {
	public void init() {
		
		setLayout(new TableLayout(4,2));
		demandField = new DoubleField();
		demandField.setFormat("#,##0.00");
		offerField = new DoubleField();
		offerField.setFormat("#,##0.00");
		splitField = new DoubleField();
		splitField.setFormat("#,##0.00");
		splitField.setActionCommand("Split");
		splitField.addActionListener(this);
		add(new JLabel("Demand"));
		add(demandField, "width=100");
		add(new JLabel("Offer"));
		add(offerField);
		add(new JLabel(" "));
		add(new JLabel(" "));
		add(new JButton("Split"));
		add(splitField);
		add(new JButton("Clear"), SOUTH);
		addActionListeners();
	}
	
	public void actionPerformed(ActionEvent e) {
		String cmd = e.getActionCommand();
		if(cmd.equals("Split")) {
			double d = demandField.getValue();
			double o = offerField.getValue();
			double s = (d + o) / 2;
			splitField.setValue(s);
		} else {
			if(cmd.equals("Clear")) {
				demandField.setValue(0);
				offerField.setValue(0);
				splitField.setValue(0);
			}
		}
	}
	
	private DoubleField demandField;
	private DoubleField offerField;
	private DoubleField splitField;
	
}

[Campbell Ritchie]

I am afraid we need more details.

Have you included all those other classes in the .jar?
Did you instruct Eclipse to mark an entry point (class with main method)?
Does your friend have a suitable JRE in the PATH on her computer?
Is it the right version of Java™? You can't run programs compiled for Java5 on a 1.4.2 JRE.
Have you got an association between .jar files and the JRE?
What sort of error message do you get?