Simple Java Problem - Please Help!

[Chris Ransley]

hi

I'm writing a program for a university project, and have hit a problem which
i can't seem to overcome. I have two class files, one which draws a button
(PhoneButton.class) and one which invokes the button (Phone.class). I want
to add a sound when the button is pressed, but I keep getting this error
when I compile it...

D:\java\Phone.java:76: cannot resolve symbol
symbol : variable myButton1
location: class Phone
if (event.getSource() == myButton1)

could anyone tell me what changes need to be made? please?!

cheers in advance

>>>>>>>

import java.awt.*;
import java.applet.Applet;
import java.awt.event.*;

public class Phone extends Applet implements ActionListener {

private Image image;
private AudioClip sound1;

public void init() {

setLayout(null);
image = getImage(getDocumentBase(), "phone.jpg");
sound1 = getAudioClip(getDocumentBase(), "sound.wav");

PhoneButton myButton1;
myButton1 = new PhoneButton(322,180, 1);
add(myButton1);
myButton1.addActionListener(this);

}

public void paint (Graphics g) {
g.drawImage(image, 0, 0, 700, 530, this);
super.paint(g);

}

public void actionPerformed(ActionEvent event)
{
if (event.getSource() == myButton1)
sound1.play();

}

}

[Kent]

Chris,

See my comments below.

Regards,
Kent

"Chris Ransley" <morgs_2k@yahoo.co.uk> wrote:
>
>hi
>
>I'm writing a program for a university project, and have hit a problem which
>i can't seem to overcome. I have two class files, one which draws a button
>(PhoneButton.class) and one which invokes the button (Phone.class). I want
>to add a sound when the button is pressed, but I keep getting this error
>when I compile it...
>
>D:\java\Phone.java:76: cannot resolve symbol
>symbol : variable myButton1
>location: class Phone
>if (event.getSource() == myButton1)
>
>could anyone tell me what changes need to be made? please?!
>
>cheers in advance
>
>>>>>>>>
>
>import java.awt.*;
>import java.applet.Applet;
>import java.awt.event.*;
>
>public class Phone extends Applet implements ActionListener {
>
>private Image image;
>private AudioClip sound1;

PhoneButton myButton1;
//declare myButton1 here (see below).

>
>public void init() {
>
>setLayout(null);
>image = getImage(getDocumentBase(), "phone.jpg");
>sound1 = getAudioClip(getDocumentBase(), "sound.wav");
>
>PhoneButton myButton1;

//declaring myButton1 here means its scope is inside the init() method.

>myButton1 = new PhoneButton(322,180, 1);
>add(myButton1);
>myButton1.addActionListener(this);
>
>}
>
>public void paint (Graphics g) {
>g.drawImage(image, 0, 0, 700, 530, this);
>super.paint(g);
>
>}
>
>public void actionPerformed(ActionEvent event)
>{
>if (event.getSource() == myButton1)

//because myButton1 is now scoped to the class this method can access it

>sound1.play();
>
>}
>
>}

[Soft Solution System Limited]

try declare your myButton1 outside init()


"Chris Ransley" <morgs_2k@yahoo.co.uk> ¼¶¼g©ó¶l¥ó
news:3cd4d307@10.1.10.29...
>
> hi
>
> I'm writing a program for a university project, and have hit a problem
which
> i can't seem to overcome. I have two class files, one which draws a
button
> (PhoneButton.class) and one which invokes the button (Phone.class). I
want
> to add a sound when the button is pressed, but I keep getting this error
> when I compile it...
>
> D:\java\Phone.java:76: cannot resolve symbol
> symbol : variable myButton1
> location: class Phone
> if (event.getSource() == myButton1)
>
> could anyone tell me what changes need to be made? please?!
>
> cheers in advance
>
> >>>>>>>
>
> import java.awt.*;
> import java.applet.Applet;
> import java.awt.event.*;
>
> public class Phone extends Applet implements ActionListener {
>
> private Image image;
> private AudioClip sound1;
>
> public void init() {
>
> setLayout(null);
> image = getImage(getDocumentBase(), "phone.jpg");
> sound1 = getAudioClip(getDocumentBase(), "sound.wav");
>
> PhoneButton myButton1;
> myButton1 = new PhoneButton(322,180, 1);
> add(myButton1);
> myButton1.addActionListener(this);
>
> }
>
> public void paint (Graphics g) {
> g.drawImage(image, 0, 0, 700, 530, this);
> super.paint(g);
>
> }
>
> public void actionPerformed(ActionEvent event)
> {
> if (event.getSource() == myButton1)
> sound1.play();
>
> }
>
> }