Class Communication/ Main Method

Hi all,

I have a main GUI class as seen here:

Code:

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

/*
 * Class is to communicate with various other classes in the program to
 * create a roster for user based on their selection on GUI.
 */
public class MainGUI extends JFrame
{
        private static final long serialVersionUID = 1L;
        //declares window width and height for program
        final int WINDOW_WIDTH = 1000;
        final int WINDOW_HEIGHT= 1000;
       
        private PlatoonPanel pp;
        private SquadPanel sp;
        private ManualPanel mp;
        private ActionButtons ab;
        private static Container pane;

        public MainGUI()
        {
                //sets title
                setTitle("Roster Generator Version 0.0.1");
                //sets window width and height
                setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
                //sets default close operation
                setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
               
                pane = getContentPane();
               
                //creates new class objects
                pp = new PlatoonPanel();
                sp = new SquadPanel();
                mp = new ManualPanel();
                ab = new ActionButtons();
               
                //calls buildGUI() method
                buildGUI();
                //sets visible to true
                setVisible(true);
        }
       
        //method that combines all the other panels from other classes and
        //combines them into one
        public void buildGUI(){
                //sets border layout for main panel
                pane.setLayout(new BorderLayout());
                //adds other panels to this main panel
                pane.add(pp.getPlatoonRosterPanel(), BorderLayout.WEST);
                pane.add(sp.getSquadRosterPanel(), BorderLayout.CENTER);
                pane.add(mp.getManualRosterPanel(), BorderLayout.EAST);
                pane.add(ab.getButtonPanel(), BorderLayout.SOUTH);
               
                }
}

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And trying to have a driver class here for the main method:

Code:

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/*
 * Driver Class for program
 */
public class MainDriver {

        public static void main(String[] args) {
               
                MainGUI mg = new MainGUI();

        }

}

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How can I communicate between these classes so that I do not receive this error:

Code:

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Exception in thread "main" java.lang.NoSuchMethodError: main

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Thanks for any help!

How are you trying to communicate? What are you trying to pass from one to the other?

I am trying to pass panels from 3 other classes to the MainGUI class, so I can add them to one panel, I want the MainDriver class to contain the main method.

Quote:

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Originally Posted by javaNewblet

I am trying to pass panels from 3 other classes to the MainGUI class, so I can add them to one panel, I want the MainDriver class to contain the main method.

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Then give the MainGui class an addPanel(JPanel p) method and in the method provide code that allows the JPanel to be placed where you want to place it.

I am not sure what the deal was, because I've never had to do it before. But I had to right click the project in the project explorer and follow a couple of screens to build a correct path(in Eclipse). In the past the path must have already been automatically correct. This solved the problem and now my class MainDriver has a functioning main method for the whole program. Thanks for all the replies and other advice you offered!

Is there a "thread solved" for this forum that I need to do? Thanks.