Have you wondered how to show a panel(form) as a dialog in java applications as done in .NET applications by using the form.showDialog() method?  For example, when a user selects “Add New” from a Customer combobox, the customer panel shows as a dialog for a new entry before the user can continue. If you have been searching for this, here is your stop.

We will be making use of one JDialog, and your FORMS(JPanels in this sense).

To implement this add a JDialog to your application. Declare a variable contentPane and add the constructor like the one specified below.

private Container contentPane = null;

public popupsjdialog(java.awt.Frame parent, JPanel panel, boolean modal) {
//super(parent, modal);
contentPane = this.getContentPane();
this.setSize(panel.getSize().width + 30, panel.getSize().width + 50);
panel.setLocation(10, 30);


Your are now done. Now to show any JPanel as a dialog add the following code to your event.

helpdetailpanel hd = new helpdetailpanel(helpContent);
hd.setSize(700, 700);
popupsjdialog d = new popupsjdialog(null, hd, true);

Helpdetailpanel is a Jpanel (form) you want to show as a dialog and the popupsjdialog is an instance of the Jdialog we created its constructot above.

Cheers !!!!!!!!!!!!!!!!!


Creating MDI Applications in Java Using Netbeans

This is a simple process for Java users who want to create Multiple Document Interface Applications in Java. The application makes use of JPanels , a JFrame and a JDesktopPane.

To start with, all your child forms should be created using panels (JPanels) as the container. A frame is then created as the parent form. A desktop pane is then added to the frame to be container for the panels on the JFrame.

Below is how the application Works

1.   Create your child forms on a panel

2.   Create a frame and add a desktoppane to it as shown below


The black color is showing the JDesktopPane. You can set the “Anchor” and “Auto Resizing” properties of the DesktopPane so that it fits the desired size of your choice.

Add the method below to your Frame Class

public void addFrame(JPanel panel, String title) {

try {

JInternalFrame[] children = jDesktopPane1.getAllFrames();

//creating a new internal frame from the Panel passes as parameter

internalframe j = new internalframe(panel, title);

//checking to see if the child form already exist

for (JInternalFrame f : children) {

if (f.getTitle().equals(j.getTitle())) {





//adding a new child




} catch (PropertyVetoException ex) {

Logger.getLogger(mainxpframe.class.getName()).log(Level.SEVERE, null, ex);



To show the child forms add the code below to the button click event

customersdetailpanel sd=new customersdetailpanel();

sd.setSize(750, 600);

addFrame(sd, "Customers Information");

the “customersdetailpanel” is one of the child forms.

Below is an interface showing showing the MDI Application


Hope this will be helpful