Unable to set focus on the JTextField

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cybernerdsx2@yahoo.com - 05 Apr 2005 05:45 GMT

Hi,

I have a JTextField in a JPanel and I would like to have JTextField set
to be the default focus with the caret blinking in it.

I have tried requestFocusInWindow(), requestFocus(), grabFocus() and
setFocusable( true) and all failed.

How can I do that?

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Arnaud Berger - 05 Apr 2005 07:45 GMT

Hi,

requestFocus should work, though.

see the following quick example :

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Focus extends JFrame {
public Focus(){
JPanel pan =new JPanel();
JTextField field1=new JTextField("11111111");
JTextField field2=new JTextField("222222222");
JTextField field3=new JTextField("333333333");
pan.add(field1);
pan.add(field2);
pan.add(field3);
setContentPane(pan);
pack();
setVisible(true);
field2.requestFocus();
}
public static void main(String[] args) {
new Focus();
}
}

Regards,

Arnaud

> Hi,
>
[quoted text clipped - 5 lines]
>
> How can I do that?

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Kari Ikonen - 14 Apr 2005 20:52 GMT

> I have a JTextField in a JPanel and I would like to have JTextField set
> to be the default focus with the caret blinking in it.
>
> I have tried requestFocusInWindow(), requestFocus(), grabFocus() and
> setFocusable( true) and all failed.

First of all: Use requestFocus(), ignore those other methods.

Then quick quesses in the order of likehood:

(a) Call to requestFocus() is done *before* window is visible.
=> requestFocus() fails

(b) non-EDT-thread tries to call requestFocus()
=> requestFocus() fails

(c) Component is not yet attached into layout
=> requestFocus() fails

(d) Component is not visible
=> requestFocus() fails

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Unable to set focus on the JTextField

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