Show new Jframe in BorderLayout.CENTER

Question

I write one JFrame with BorderLayout and Jmenu when I click Menu > Test I wana show me one new Jframe IN BorderLayout.CENTER.
new Frame2(); with BorderLayout.CENTER. Plz Can sobody show me how can I do this.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
    class JFrameIconScrollPane extends JFrame {
         private JLabel label1, label2, label3, label4, label5;
         private JMenu menu;
         private JMenuItem menuItemTest;
        JFrameIconScrollPane()
             super("JFrame Icon ScrollPane");
             setLayout(new BorderLayout(5, 5));
             label1 = new JLabel("---CENTER---");
            add(label1, BorderLayout.CENTER);
            label1.setOpaque(true);
             label1.setBackground(Color.RED);
            label2 = new JLabel("---NORTH---"); 
            add(label2, BorderLayout.NORTH);
            label3 = new JLabel("--- WEST ---");
            add(label3, BorderLayout.WEST);
            label4 = new JLabel("--- EAST ---");
            add(label4, BorderLayout.EAST);
            label5 = new JLabel("--- SOUTH ---");
            add(label5, BorderLayout.SOUTH);
      JMenuBar menuBar = new JMenuBar();
      menu = new JMenu( "Menu" );
      menuBar.add(menu);
      menuItemTest = new JMenuItem( "TEST" );
      menu.add(menuItemTest);     
// (creates a listener)
      TestListener theTestListener = new TestListener();
      menuItemTest.addActionListener(theTestListener);
       setJMenuBar(menuBar); // set menu bar for this application               
        class TestListener implements ActionListener
             public void actionPerformed(ActionEvent event)
                  new Frame2();
       public static void main(String args[])
              JFrameIconScrollPane j = new JFrameIconScrollPane();
              j.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
             j.setSize(900, 600);
             j.setVisible(true);
             j.setLocationRelativeTo(null);
and new JFrame
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
    class Frame2 extends JFrame{ 
         private JLabel label1, label2, label3, label4, label5;
        Frame2() {
           setLayout(new BorderLayout(5, 5));
             label1 = new JLabel("Frame 2---CENTER---");
            add(label1, BorderLayout.CENTER);
            label1.setOpaque(true);
             label1.setBackground(Color.RED);
            label2 = new JLabel("Frame 2---NORTH---"); 
            add(label2, BorderLayout.NORTH);
            label3 = new JLabel("Frame 2--- WEST ---");
            add(label3, BorderLayout.WEST);
            label4 = new JLabel("Frame 2--- EAST ---");
            add(label4, BorderLayout.EAST);
            label5 = new JLabel("Frame 2--- SOUTH ---");
            add(label5, BorderLayout.SOUTH);
                setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                setSize(360, 350);
                setVisible(true);
                setLocationRelativeTo(null);
    }

Answer 1

this may be close to what you're trying to do, using a CardLayout.
clicking the menuItem changes the entire display.
if you just want the center part to change, a slight modification is required.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
class JFrameIconScrollPane
  private JLabel label1, label2, label3, label4, label5;
  private JMenu menu;
  private JMenuItem menuItemTest;
  CardLayout cl = new CardLayout();
  JFrame f;
  JFrameIconScrollPane()
    f = new JFrame("JFrame Icon ScrollPane");
    f.getContentPane().setLayout(cl);
    JPanel p = new JPanel();
    p.setLayout(new BorderLayout(5, 5));
    label1 = new JLabel("---CENTER---");
    p.add(label1, BorderLayout.CENTER);
    label1.setOpaque(true);
    label1.setBackground(Color.RED);
    label2 = new JLabel("---NORTH---");
    p.add(label2, BorderLayout.NORTH);
    label3 = new JLabel("--- WEST ---");
    p.add(label3, BorderLayout.WEST);
    label4 = new JLabel("--- EAST ---");
    p.add(label4, BorderLayout.EAST);
    label5 = new JLabel("--- SOUTH ---");
    p.add(label5, BorderLayout.SOUTH);
    f.getContentPane().add("0",p);
    f.getContentPane().add("1",new Frame2().getFrame2Panel());
    JMenuBar menuBar = new JMenuBar();
    menu = new JMenu( "Menu" );
    menuBar.add(menu);
    menuItemTest = new JMenuItem( "Other Panel" );
    menu.add(menuItemTest);
    TestListener theTestListener = new TestListener();
    menuItemTest.addActionListener(theTestListener);
    f.setJMenuBar(menuBar);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setSize(900, 600);
    f.setLocationRelativeTo(null);
    f.setVisible(true);
  class TestListener implements ActionListener
    public void actionPerformed(ActionEvent event)
      cl.next(f.getContentPane());
  public static void main(String args[]){JFrameIconScrollPane j = new JFrameIconScrollPane();}
class Frame2
  private JLabel label1, label2, label3, label4, label5;
  public JPanel getFrame2Panel()
    JPanel p = new JPanel();
    p.setLayout(new BorderLayout(5, 5));
    label1 = new JLabel("Frame 2---CENTER---");
    p.add(label1, BorderLayout.CENTER);
    label1.setOpaque(true);
    label1.setBackground(Color.RED);
    label2 = new JLabel("Frame 2---NORTH---");
    p.add(label2, BorderLayout.NORTH);
    label3 = new JLabel("Frame 2--- WEST ---");
    p.add(label3, BorderLayout.WEST);
    label4 = new JLabel("Frame 2--- EAST ---");
    p.add(label4, BorderLayout.EAST);
    label5 = new JLabel("Frame 2--- SOUTH ---");
    p.add(label5, BorderLayout.SOUTH);
    p.setPreferredSize(new Dimension(360, 350));
    return p;
}