AccessLevelClass1  (main class from which I am starting)
------------------
package AccessLevelPack1;

import AccessPack.AccessClass;
import java.sql.DriverManager;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;

public class AccessLevelClass1
{
    public static void main(String arg[])
    {
        Connection con=null;
        try
        {
                Class.forName("oracle.jdbc.driver.OracleDriver");
                 con=DriverManager.getConnection(
                "jdbc:oracle:thin:@<hostname>:1521:<dbname>",<username>,<password>);
                AccessClass a=new AccessClass();
                a.trig("100",con);
        }catch(Exception e) {
           e.printStackTrace();
         }
    }
}





AccessClass class
-------------------
package AccessPack;

import SampleWebPack.Demo_Main;

import java.sql.DriverManager;
import java.sql.Connection;

public class AccessClass {
    public void trig(String userid,Connection con)throws Exception{
        System.out.println("userid-"+userid);
        String ar[] = new String[2];
        ar[0]=userid;
        ar[1]=String.valueOf(con);
        System.out.println("userid-"+ar[0]);
        Demo_Main.main(ar);
    }
}





DEMO_MAIN class
------------------
package SampleWebPack;

import java.awt.Color;
import java.awt.image.BufferedImage;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.ImageIcon;
import javax.swing.JDialog;
import javax.swing.JLabel;
import java.awt.Image ;
import java.io.*;
import java.sql.*;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;


public class Demo_Main extends javax.swing.JFrame   {
     public static void main(String args[])
     {
        if (args.length!=0)
           System.out.println("args are there-"+args[0]+"   "+args[1] );
        else
            System.out.println("args are not there" );
     }
     Connection c=args[1];  //compilation error: java.sql.Connection expected but got java.sql.String
}