combobox

[praveen shinde]

Hi ,
I have created a jframe which contains a combobox.
I want the combobox to be populated with data from a database as soon as the window/Jframe is displayed.
How to do this.
Any help is welcome.
Regards,
Praveen Shinde

[Campbell Ritchie]

I presume you are familiar with database access?

[praveen shinde]

Hi Ritchie,
I am familar with database access.
My main problem is to display the data in the combo box as soon as the Jframe is opened.
regards,
Praveen

[Maneesh Godbole]

1) Subclass JComboBox
2) Provide a method called loadData which will connect to the DB, pull out required data and insert into the JComboBox. Make sure this happens in a separate thread .
3) Add your subclassed combo box instance to the frame.
4) Overide setVisible() in your frame instance
5) Invoke super.setVisible() and combo.loadData() in your overridden setVisible()

And yes. In future please UseAMeaningfulSubjectLine

[praveen shinde]

Hi maneesh,
Thanks for the help.
I will try out your suggestions.
yes I will use more relevant headlines in future.
regards,
Praveen

[praveen shinde]

Hello Maneesh,
I created a frame with 6 panel(without using drag n drop facility of Netbeans). I still cant see all the panels. I even tried adding a scrollbar.
Please help
Thanks
Praveen

[Michael Dunn]

is this just a continuation of your other thread?

https://coderanch.com/t/506199/GUI/java/panels-not-displayed-fullly-Jframe

if so, instead of encouraging everyone to play '20-guesses', why don't you post your code,
so we can see what you're doing (incorrectly).

[Jelle Klap]

Maneesh Godbole wrote:1) Subclass JComboBox
2) Provide a method called loadData which will connect to the DB, pull out required data and insert into the JComboBox. Make sure this happens in a separate thread .
3) Add your subclassed combo box instance to the frame.
4) Overide setVisible() in your frame instance
5) Invoke super.setVisible() and combo.loadData() in your overridden setVisible()

And yes. In future please UseAMeaningfulSubjectLine

I'd prefer loading the data via a ComboBoxModel implementation, instead of tying a subclass of JComboBox directly (or indirectly) to a datasource via a custom loadData() method.