action listeners

[Jon]

Hi, im trying to create an interface, which has a button and 2 radio
buttons, which affect text which is outputted to a text area when the button
is pressed. The button works on its own, but I can not get it to work when
one of the radio buttons is selected. I can also get the radio buttons
working separetly, but I need the effect of the radiobutton to take place
only when the button is pressed.
Here is the code I am using for the event handling:

Object source = evt.getSource() ;
if(source == button)
{
if(source == rButton1)
{
//manipulate and display text
}
}

Also, does anyone know of any good java reference websites other than
java.sun.com?
Thanks,
Jon.

[Jon]

Re: action listeners


"Jon" <ivegotsexyhair @blueyonder.co. uk> wrote in message
news:Nyp2b.277$ yc5.67@news-binary.blueyond er.co.uk...[color=blue]
> Hi, im trying to create an interface, which has a button and 2 radio
> buttons, which affect text which is outputted to a text area when the[/color]
button[color=blue]
> is pressed. The button works on its own, but I can not get it to work[/color]
when[color=blue]
> one of the radio buttons is selected. I can also get the radio buttons
> working separetly, but I need the effect of the radiobutton to take place
> only when the button is pressed.
> Here is the code I am using for the event handling:
>
> Object source = evt.getSource() ;
> if(source == button)
> {
> if(source == rButton1)
> {
> //manipulate and display text
> }
> }
>
> Also, does anyone know of any good java reference websites other than
> java.sun.com?
> Thanks,
> Jon.
>
>[/color]

I have also tried:
if(rButton1 == true)
{
....
}
but I get an error saying I cant use ++ with the Boolean value.
With the code in the last post, it ran the code ok, but nothing happened
when I pressed the buttons even though I had added action listeners and
implemented it into the class.

[Jon]

Re: action listeners


"Chris" <chris2k01@hotm ail.com> wrote in message
news:nZq2b.5084 5$K44.23625@edt nps84...[color=blue]
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Jon wrote:
>[color=green]
> > Hi, im trying to create an interface, which has a button and 2 radio
> > buttons, which affect text which is outputted to a text area when
> > the button
> > is pressed. The button works on its own, but I can not get it to
> > work when
> > one of the radio buttons is selected. I can also get the radio
> > buttons working separetly, but I need the effect of the radiobutton
> > to take place only when the button is pressed.
> > Here is the code I am using for the event handling:
> >
> > Object source = evt.getSource() ;
> > if(source == button)
> > {
> > if(source == rButton1)
> > {
> > //manipulate and display text
> > }
> > }
> >
> > Also, does anyone know of any good java reference websites other
> > than java.sun.com?
> > Thanks,
> > Jon.[/color]
>
> Hi,
> Assuming you're using Swing (not AWT), you need to replace the above
> fragment of code with the following:
>
> Object source = evt.getSource() ;
> if (source == button) {
> if (rButton1.isSel ected()) {
> // do stuff for radio 1
> } else if (rButton2.isSel ected()) {
> // do stuff for radio 2
> }
> }
>
> The point is, that the source variable is a reference to an object.
> The code you tried will never get executed, since the source variable
> contains the "button" reference, but if it does, it will not contain
> "rButton1". It's like saying that if x is set to 5, it can't be 7 at
> the same time.
>
> The source object is the button the user actually clicked on. If you
> need the state of the other buttons, you ask for it from the buttons
> themselves.
>
> If you're using AWT instead of Swing, replace isSelected() with
> getState().
>
> - --
> Chris
> -----BEGIN PGP SIGNATURE-----
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>
> iD8DBQE/SdmvwxczzJRavJY RAp1PAJ9uWn5iD3 VU9rQAgtkY0FCqk PdFBACghcYZ
> k/AxGRzBGdvlsq6Ou a7HIP8=
> =v2Zz
> -----END PGP SIGNATURE-----[/color]

Thanks for the help, I thougth it might be a method, but I haven't been
using java for long, so I wasn't aware of it.
I'm trying to do the same with combo boxes, but am only aware of using the
following:

String choice = (String)((JComb oBox)source).ge tSelectedItem() ;
if(choice=="Nam e of item")
{
//execute code
}

but this does not work with the button. I have a feeling that it is because
of the same reason the radio buttons would not work because I am using
source twice, but again, I am not aware of any methods that I can use.
Thanks.