Thread: Help with a GUI Concept

Hi there I'm new to Java so excuse and mistakes I make and help me to to understand certain concepts.
I have recently decided I wanted to use a GUI as the equivalent as a main menu using JButtons to run other classes main methods but i do not know the method to call out the main method though use of a action listener.
for example:

// this action listener would send a message to the screen
button.addActionListener(new ActionListener() {
 
            public void actionPerformed(ActionEvent e)
            {
                //Execute when button is pressed
                System.out.println("You clicked the button");
            }

an example of what I mean is if you had two classes called 'Class1' & 'Class2' and within class one with the main method was a simple system.out.println how could I call the classes main method though the click of a button in a GUI in 'Class2' within the same package.

public class Class1
{
    public static void main(String arg[])
    {
    System.out.println("You clicked the button from another class");
}
}

This isn't a very detailed explanation but if you can help me in anyway its very very much appriciated.
Thanks