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Set focus on JComboBox

Posted on 2004-04-02
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Last Modified: 2012-06-21
How can i set focus on JComboBox??? i checked the JComboBox API but didn't get the setFocus property.

thanks
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Question by:Kennywen
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CEHJ earned 25 total points
ID: 10739254
combo.requestFocus();
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Author Comment

by:Kennywen
ID: 10739268
JComboBox dBox = new JComboBox(dLists);
dBox.addActionListener(this);
dBox.setActionCommand("Combo1");
dBox.requestFocus();

but the combobox doesn't get focus.

thanks
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LVL 30

Expert Comment

by:Mayank S
ID: 10739293
Try an updateUI () call for your container (which contains the JComboBox) after requestFocus ().
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LVL 37

Expert Comment

by:zzynx
ID: 10739300
You better wait to perform

         dBox.requestFocus();

until it is really needed and after all (window/frame/dialog) initialization is done.

Maybe you can post more complete code
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LVL 86

Expert Comment

by:CEHJ
ID: 10739341
You really need to do this in a window listener if you want this to happen as soon as your app is shown. See

http://javaalmanac.com/egs/java.awt/focus_InitialFocus.html
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Expert Comment

by:Mayank S
ID: 10739369
Can it not be done in a statement just after show () or setVisible ( true ) ?
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Expert Comment

by:Mayank S
ID: 10739376
I mean - the updateUI () ?
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Expert Comment

by:RobCSP
ID: 10739380
Try it:


combo.requestFocusInWindow();


I hope that it  helps,

ROB
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Author Comment

by:Kennywen
ID: 10739397
i solve the problem by using coding below:

myFrame.setResizable(false);
dBox.requestFocus();
myFrame.setVisible(true);

any disadvantage on above code?

thanks
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LVL 86

Expert Comment

by:CEHJ
ID: 10739413
If what i first suggested is working, then stick with that
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Author Comment

by:Kennywen
ID: 10739422
sure i will but just want to know any disadvantage on it?
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LVL 86

Expert Comment

by:CEHJ
ID: 10739434
Not having a deep enough knowledge of focus - i'd probably resort to trial and error myself ;-)
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Expert Comment

by:CEHJ
ID: 10739456
8-)
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