Opening a Second JInternalFrame

Question

Below I have two classes InternalFrameDemo instantiates MyInternalFrame (extends javax.swing.JInternalFrame ) in doing this the application creates a JDesktopPane and creates a MyInternalFrame to put in it.
What I want to happen is when the jButton1 on the MyInternalFrame is clicked is for a second MyInternalFrame to open and the first MyInternalFrame to close is this possible?
I think that I would need to have the action Method in MyInternalFrame trigger a method call in the InternalFrameDemo and do the closing and opening of new MyInternalFrame from there?
Thanks
package components;
import javax.swing.JInternalFrame;
import javax.swing.JDesktopPane;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JMenuBar;
import javax.swing.JFrame;
import javax.swing.KeyStroke;
import java.awt.event.*;
import java.awt.*;
public class InternalFrameDemo extends JFrame
implements ActionListener {
JDesktopPane desktop;
public InternalFrameDemo() {
super("InternalFrameDemo");
int inset = 50;
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setBounds(inset, inset,
screenSize.width - inset*2,
screenSize.height - inset*2);
desktop = new JDesktopPane();
createFrame();
setContentPane(desktop);
setJMenuBar(createMenuBar());
desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
protected JMenuBar createMenuBar() {
JMenuBar menuBar = new JMenuBar();
JMenu menu = new JMenu("Document");
menu.setMnemonic(KeyEvent.VK_D);
menuBar.add(menu);
JMenuItem menuItem = new JMenuItem("New");
menuItem.setMnemonic(KeyEvent.VK_N);
menuItem.setAccelerator(KeyStroke.getKeyStroke(
KeyEvent.VK_N, ActionEvent.ALT_MASK));
menuItem.setActionCommand("new");
menuItem.addActionListener(this);
menu.add(menuItem);
return menuBar;
public void actionPerformed(ActionEvent e) {
if ("new".equals(e.getActionCommand())) {
createFrame();
} else {
quit();
protected void createFrame() {
MyInternalFrame frame = new MyInternalFrame();
frame.setVisible(true);
desktop.add(frame);
try {
frame.setSelected(true);
} catch (java.beans.PropertyVetoException e) {}
MyInternalFrame frame2 = new MyInternalFrame();
frame.setVisible(true);
desktop.add(frame2);
try {
frame2.setSelected(true);
} catch (java.beans.PropertyVetoException e) {}
public void closeWin(){
protected void quit() {
System.exit(0);
private static void createAndShowGUI() {
JFrame.setDefaultLookAndFeelDecorated(true);
InternalFrameDemo frame = new InternalFrameDemo();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
public static void main(String[] args) {     
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
/*MyInternalFrame */
package components;
public class MyInternalFrame extends javax.swing.JInternalFrame {
@SuppressWarnings("unchecked")
private void initComponents() {
jButton1 = new javax.swing.JButton();
jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(152, 152, 152)
.addComponent(jButton1)
.addContainerGap(169, Short.MAX_VALUE))
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(108, 108, 108)
.addComponent(jButton1)
.addContainerGap(147, Short.MAX_VALUE))
pack();
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                        
this.dispose();
private javax.swing.JButton jButton1;
}

Answer 1

Don't forget to use the Code Formatting Tags so the posted code retains its original formatting. That is done by selecting the code and then clicking on the "Code" button above the question input area.
I think that I would need to have the action Method in MyInternalFrame trigger a method call in the InternalFrameDemo and do the closing and opening of new MyInternalFrame from there?Correct. So give it a try and see what happens.