How Donot open JFrame More then one time? please help

[vijay Panner]

Hi,

I am developing one Desktop Application Using Swing. In my application, I designed Menu frame, whenever i click one menu_item respective page will load, suppose again i click same menu_item then one more same frame is opened.But i need only one frame , if already exist then i will show one pop_up Dialog to display "Already opened" or to show the frame in front of all opened frame.how i solve this ?

[Maneesh Godbole]

Vijay,
Please UseAMeaningfulSubjectLine
You can change your subject line by clicking on the

How is the frame being opened? Some action such as button click? Or do you mean to say running the application twice opens two frames?
Please TellTheDetails

[vijay Panner]

vijay Panner wrote:Hi,

I am developing one Desktop Application Using Swing. In my application, I designed Menu frame, whenever i click one menu_item respective page will load, suppose again i click same menu_item then one more same frame is opened.But i need only one frame , if already exist then i will show one pop_up Dialog to display "Already opened" or to show the frame in front of all opened frame.how i solve this ?

[Rob Spoor]

Keep a reference to the frame. Initially, if it's null, you create it and show it. Any future call it won't be null so you can just show it. Something like this:

private JFrame childFrame; // or whatever more appropriate name

if (childFrame == null)
{
    childFrame = ...
}
childFrame.setVisible(true);