please help me in creating a form using Swing.

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boris - 10 Aug 2007 13:36 GMT

I am creating a form using SWING.Now in the form I have one JComboBox
of COUNTRY and other of STATE.Now I want it in such a way that when I
select a country from the COUNTRY JComboBox ,the corresponding states
automatically appears in the STATE JComboBox.Please help.
I hope I've put up my query clearly.
Still learning java!!:)

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Andrew Thompson - 10 Aug 2007 15:03 GMT

>I am creating a form ..

Form? Using Netbeans, are you? Does that translate
to a javax.swing.JFrame?

>..using SWING.

That is 'Swing' (no need to SHOUT). Please also put
a space, or preferably 2, after each full stop.

>..Now in the form I have one JComboBox
>of COUNTRY and other of STATE.

Normal Java nomenclature would suggest the UPPER_CASE
attribute names mean the member is final. Other attributes
(and methods) should be camelCase.

>...Now I want it in such a way that when I
>select a country from the COUNTRY JComboBox ,the corresponding states
>automatically appears in the STATE JComboBox.

The COUNTRY combo needs a Listener attached.
Either an ActionListener, or more likely an ItemListener*.
When the listener is activated, (re)populate the STATE
with a new ComboBoxModel**, representing the states.

* <http://java.sun.com/javase/6/docs/api/javax/swing/JComboBox.html#addItemListener
(java.awt.event.ItemListener
)>
** <http://java.sun.com/javase/6/docs/api/javax/swing/JComboBox.html#setModel(javax.
swing.ComboBoxModel
)>

>Still learning java!!:)

A good group for those learning java is comp.lang.java.help.
comp.lang.java.gui specialises in GUI matters.

The JavaDocs (linked above) are invaluable for Java
development. Download them, bookmark them, or both.
The Java Tutorial has excellent 'trails' on Swing & Events.
<http://java.sun.com/docs/books/tutorial/uiswing/>
<http://java.sun.com/docs/books/tutorial/uiswing/events/index.html>

HTH

Signature

Andrew Thompson
http://www.athompson.info/andrew/

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boris - 10 Aug 2007 18:11 GMT

thank you very much.

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please help me in creating a form using Swing.

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