Java SE (Java Platform, Standard Edition)

I have an application that uses two JFrame forms - each one coming from its own class. I want to do it such that when I click on a button on the JFrame1, it hides JFrame1 (from class1) and shows JFrame2 (from class2), and vice versa. However I do not want to invoke new instances of these each time and maintain any values that have been entered into Jtext box or any variables in either forms. Currently I use Main.java that calls the Class1.

Main calls JFrameLoad
JFrameLoad calls JAdvMap AND JAdvMap calls JFrameLoad


Below is what I have:
I need help with the two lines marked with ********************


-- Main.java -----

package dl2;

/**
 *
 * @author Chirag
 */
public class Main {
    
    /** Creates a new instance of Main */
    public Main() {
    }
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        JFrameLoad j1 = new JFrameLoad();
        j1.show();
        
        
    }
    
}

-----JFrameLoad -----

package dl2;
import javax.swing.*;
import java.io.*;
import java.sql.*;
import java.util.StringTokenizer;


/**
 *
 * @author  Chirag
 */
public class JFrameLoad extends javax.swing.JFrame {
    
  public static  UIManager.LookAndFeelInfo looks[];
  public static Thread connectServerThread = null;
  static String[] values;
  public JAdvMap jm1 = new JAdvMap();
  
    /** Creates new form JFrameLoad */
    public JFrameLoad() {
        initComponents();
        
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">
    private void initComponents() {
        jButton1 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jtxtUsername = new javax.swing.JTextField();
        jtxtPassword = new javax.swing.JPasswordField();
        jbtnConnect = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        jMessage = new javax.swing.JTextArea();
        jTextArea1 = new javax.swing.JTextArea();
        jbtnRead = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();

        getContentPane().setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        ImageIcon icon = new ImageIcon("./dl2.gif");
        setIconImage(icon.getImage()
        );
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowActivated(java.awt.event.WindowEvent evt) {
                formWindowActivated(evt);
            }
        });

        jButton1.setLabel("Exit");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        getContentPane().add(jButton1, new org.netbeans.lib.awtextra.AbsoluteConstraints(290, 270, -1, -1));

        jLabel1.setText("Username:");
        getContentPane().add(jLabel1, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 50, -1, -1));

        jLabel2.setText("Password:");
        getContentPane().add(jLabel2, new org.netbeans.lib.awtextra.AbsoluteConstraints(20, 80, -1, -1));

        jtxtUsername.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jtxtUsernameActionPerformed(evt);
            }
        });

        getContentPane().add(jtxtUsername, new org.netbeans.lib.awtextra.AbsoluteConstraints(80, 50, 260, -1));

        getContentPane().add(jtxtPassword, new org.netbeans.lib.awtextra.AbsoluteConstraints(80, 80, 260, -1));

        jbtnConnect.setText("Test Connection");
        jbtnConnect.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jbtnConnectActionPerformed(evt);
            }
        });

        getContentPane().add(jbtnConnect, new org.netbeans.lib.awtextra.AbsoluteConstraints(90, 270, -1, -1));

        jMessage.setLineWrap(true);
        jMessage.setRows(100000000);
        jMessage.setWrapStyleWord(true);
        jMessage.setMinimumSize(new java.awt.Dimension(100, 17));
        jMessage.setPreferredSize(new java.awt.Dimension(2, 1700000000));
        jScrollPane1.setViewportView(jMessage);

        getContentPane().add(jScrollPane1, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 310, 460, 60));

        getContentPane().add(jTextArea1, new org.netbeans.lib.awtextra.AbsoluteConstraints(410, 160, -1, -1));

        jbtnRead.setText("Read File");
        jbtnRead.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jbtnReadActionPerformed(evt);
            }
        });

        getContentPane().add(jbtnRead, new org.netbeans.lib.awtextra.AbsoluteConstraints(220, 210, -1, -1));

        jButton2.setText("Click to Switch");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
            }
        });

        getContentPane().add(jButton2, new org.netbeans.lib.awtextra.AbsoluteConstraints(350, 210, -1, -1));

        java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        setBounds((screenSize.width-468)/2, (screenSize.height-409)/2, 468, 409);
    }
    // </editor-fold>

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
// ******************** THIS IS WHAT I AM DOING TO SWITCH BETWEEN FORMS THE jm1 IS INITIALIZED AS PUBLIC IN THIS CLASS
        jm1.show();
        this.hide();
        
    }

----- JAdvMap--- ----

package dl2;

/**
 *
 * @author  chiragk
 */
public class JAdvMap extends javax.swing.JFrame {
    
    /** Creates new form JAdvMap */
    public JAdvMap() {
        initComponents();
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">
    private void initComponents() {
        jTest = new javax.swing.JTextField();
        jBtn = new javax.swing.JButton();

        getContentPane().setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        getContentPane().add(jTest, new org.netbeans.lib.awtextra.AbsoluteConstraints(270, 100, 140, -1));

        jBtn.setText("Click to Switch");
        jBtn.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jBtnActionPerformed(evt);
            }
        });

        getContentPane().add(jBtn, new org.netbeans.lib.awtextra.AbsoluteConstraints(340, 160, -1, -1));

        pack();
    }
    // </editor-fold>

    private void jBtnActionPerformed(java.awt.event.ActionEvent evt) {
// ********************HOW DO I MAKE SURE THAT I SHOW THE JFrameLoad THAT CALLED THIS FORM? 

        this.hide();

    }
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new JAdvMap().setVisible(true);
            }
        });
    }
    
    // Variables declaration - do not modify
    private javax.swing.JButton jBtn;
    private javax.swing.JTextField jTest;
    // End of variables declaration
    
}