How can I run a Class file with an if / else button?

I am relativley new to the exposure of the Java Language and was pondering about my lines of code that I have written. To summarize my goals at the end of this question I would like to have assistance on achieving a JButton that contains an ActionListener with 'If'to run a class that is on a different file in the same directory.(The 'Else' function is working fine, its the 'If'). (I have 2 files, one being main.java and the other being home.java(I am using Eclipse IDE)(The problem for me occurs at the JButton where I dispose main to close that and attempt to run the class file.)

Here is home.java:

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

public class home {
    public static void main(String[] args) {
        JFrame h = new JFrame("Welcome - LonelyChat v1.0");
            h.setResizable(false);
            h.setSize(500, 500);
            h.setDefaultCloseOperation(h.EXIT_ON_CLOSE);

    }

}

Here is main.java (Not all the code, only the main important lines):

//Username login field
JTextField username = new JTextField("Username", 20);

//Password login field
JPasswordField password = new JPasswordField("Password", 20);

//Main window frame
JFrame main = new JFrame("Window");
    main.setDefaultCloseOperation(main.EXIT_ON_CLOSE);
    main.setVisible(true);
    main.setSize(500, 500);
    main.setLocationRelativeTo(null);
    main.setResizable(false);

//Login Button

JButton login = new JButton("Login");
    login.addActionListener(new ActionListener() {
        public  void actionPerformed(ActionEvent arg0) {
            String uname=username.getText();
            String psw=password.getText();

            if(uname.equals("lonely") && psw.equals("pass"))
            {
                JOptionPane.showMessageDialog(main,"Succuess! Now logged in!");
                // logged in 

                main.dispose();
            }
            else
            {
                JOptionPane.showMessageDialog(main,"Failed! Wrong Username or Password!");
            }
        }
    });

Basically I am having trouble on running a separate class in a different java file with a JButton with If and else. I have tried things such as:

   example ex = new example();
   ex.setVisible(true);

( Method 1 /\ and Method 2 / )

   ex1.dispose(); //this method works but I do not want another JFrame in the          
   ex2.setVisible(true); //same file