Как перенести внешний JFrame во внутренний?

я бегиннер в Java. Моя проблема заключается в том, что я хочу чтобы мой JFrame ,который создаётся в PlayerTable, отображался в JFrame ,который создаётся в JFJB. Я пробовал присваивать один JFrame другому, но идея даже звучала сомнительно...

JFJB.java

public class JFJB extends javax.swing.JFrame {

/**
 * Creates new form JFJB
 */
public JFJB() {
    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.
 */
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
private void initComponents() {

    jButton1 = new javax.swing.JButton();
    jButton2 = new javax.swing.JButton();
    jMenuBar1 = new javax.swing.JMenuBar();
    jMenu1 = new javax.swing.JMenu();
    jMenuItem2 = new javax.swing.JMenuItem();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    jButton1.setText("jButton1");

    jButton2.setText("jButton2");

    jMenu1.setText("File");

    jMenuItem2.setFont(new java.awt.Font("Castellar", 0, 14)); // NOI18N
    jMenuItem2.setText("Make PT1");
    jMenuItem2.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jMenuItem2ActionPerformed(evt);
        }
    });
    jMenu1.add(jMenuItem2);

    jMenuBar1.add(jMenu1);

    setJMenuBar(jMenuBar1);

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 659, Short.MAX_VALUE)
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGap(0, 279, Short.MAX_VALUE)
    );

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

private void jMenuItem2ActionPerformed(java.awt.event.ActionEvent evt) {                                           
    jMenuItem2.addActionListener(e -> {
    PlayerTable.createPlayerTable();
        });
  
}                                          

/**
 * @param args the command line arguments
 */
public static void main(String args[]) {
    /* Set the Nimbus look and feel */
    //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
    /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
     * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
     */
    try {
        for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                javax.swing.UIManager.setLookAndFeel(info.getClassName());
                break;
            }
        }
    } catch (ClassNotFoundException ex) {
        java.util.logging.Logger.getLogger(JFJB.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
        java.util.logging.Logger.getLogger(JFJB.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        java.util.logging.Logger.getLogger(JFJB.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        java.util.logging.Logger.getLogger(JFJB.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //</editor-fold>

    /* Create and display the form */
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new JFJB().setVisible(true);
        }
    });
}

// Variables declaration - do not modify                     
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JMenu jMenu1;
private javax.swing.JMenuBar jMenuBar1;
private javax.swing.JMenuItem jMenuItem2;
// End of variables declaration                   
}

PlayerTable.java

import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;


 public class PlayerTable extends JFrame {

 public static void createPlayerTable() {
      JFrame frame = new JFrame("Test frame");
      frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

      String[] columnNames = {
                "Name",
                "Score"
      };
       
      
      String[][] data = {
                {"addins", "02.11.2006 19:15", "Folder", ""},
                {"AppPatch", "03.10.2006 14:10", "Folder", ""},
                {"assembly", "02.11.2006 14:20", "Folder", ""},
                {"Boot", "13.10.2007 10:46", "Folder", ""},
                {"Branding", "13.10.2007 12:10", "Folder", ""},
                {"Cursors", "23.09.2006 16:34", "Folder", ""},
                {"Debug", "07.12.2006 17:45", "Folder", ""},
                {"Fonts", "03.10.2006 14:08", "Folder", ""},
                {"Help", "08.11.2006 18:23", "Folder", ""},
                {"explorer.exe", "18.10.2006 14:13", "File", "2,93MB"},
                {"helppane.exe", "22.08.2006 11:39", "File", "4,58MB"},
                {"twunk.exe", "19.08.2007 10:37", "File", "1,08MB"},
                {"nsreg.exe", "07.08.2007 11:14", "File", "2,10MB"},
                {"avisp.exe", "17.12.2007 16:58", "File", "12,67MB"},
      };
       
      JTable table = new JTable(data, columnNames);
       
      JScrollPane scrollPane = new JScrollPane(table);
       
      frame.getContentPane().add(scrollPane);
      frame.setPreferredSize(new Dimension(450, 200));
      frame.pack();
      frame.setLocationRelativeTo(null);
      frame.setVisible(true);
 }
 }