ActionListeners and scope

Question

Hello,
I have been trying to get my action listener to work so that it outputs the volume that is passed into. I want to limit the volume between 0 and 15 or there abouts. I have been reading books upon books to try and figure out where i have gone wrong but i just can't seem to figure it.
Here is my code below. any help would be appreciated
import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
* Gareth Leah
class volumeControl extends JFrame {
public class VolumeSensor {
private int lowVolume;
private int maxVolume;
private int volume;
//CONSTRUCTORS
public VolumeSensor() {
this(null,0, 15, 10);
public VolumeSensor(String n, int lowVolume, int maxVolume, int volume) {
this.lowVolume = lowVolume;
this.maxVolume = maxVolume;
this.volume = volume;
//methods
public int getlowVolume() {
return lowVolume;
public void setlowVolume(int lowVolume) {
this.lowVolume = lowVolume;
public int getmaxVolume() {
return maxVolume;
public void setmaxVolume(int maxVolume) {
this.maxVolume = maxVolume;
public int getVolume() {
return volume;
public void setVolume(int volume) {
this.volume = volume;
public boolean Mute(){
return true;
public volumeControl() {
this.setTitle("Volume Controller");     
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel p = new JPanel();
//--------Volume Label------------------------------
JLabel Label = new JLabel("Volume");
Label.setForeground(Color.black);
Font font = new Font("Serif", Font.PLAIN, 15);
Label.setFont(font);
//--------Mute------------------------------
JCheckBox Mute = new JCheckBox("Mute");
Mute.setSelected(false);
p = new JPanel();
p.add(Mute);
this.add(p, BorderLayout.SOUTH);
//--------Volume------------------------------
final JSlider volume = new JSlider(0,15,7);
volume.setOrientation(SwingConstants.VERTICAL);
volume.setToolTipText("Volume Control");
volume.setPaintTicks(true);
volume.setPaintLabels(true);
//------------------Set it out---------------
p.setLayout(new BoxLayout(p, BoxLayout.PAGE_AXIS));
p.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));
p.add(Box.createHorizontalGlue());
p.add(Label);
p.add(volume,BorderLayout.CENTER);
p.add(Box.createRigidArea(new Dimension(10, 0)));
p.add(Mute);
//actionlistener
volume.addChangeListener(new ChangeListener() {
+public void stateChanged(ChangeEvent slider) {+
JSlider volume = (JSlider)slider.getVolume() ;
if (slider.volume>15)
System.out.println(volume);
+ +//int volume = (int)volume.getVolume();++
++// if (volume == 0) {++
++// if (lowVolume) Mute(false);++
+} else {+
System.out.println(volume);
+}+
+});+
this.pack();
this.setVisible(true);
/* Test */
public static void main(String[] arg) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
volumeControl v = new volumeControl();

Answer 1

Thanks again! i feel like im starting to get the hang of this. I have changed my program to:
import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
* Gareth Leah
class volumeControl extends JFrame {
public class VolumeSensor {
    public boolean Mute(){
        return true;
        public volumeControl() {
        this.setTitle("Volume Controller");     
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JPanel p = new JPanel();
         //--------Volume Label------------------------------
        JLabel Label = new JLabel("Volume");
        Label.setForeground(Color.black);
        Font font = new Font("Serif", Font.PLAIN, 15);
        Label.setFont(font);
         //--------Mute------------------------------
        JCheckBox Mute = new JCheckBox("Mute");
        Mute.setSelected(false);
        p = new JPanel();
        p.add(Mute);
        this.add(p, BorderLayout.SOUTH);
        //--------Volume------------------------------
        final JSlider volume = new JSlider(0,15,7);
        volume.setOrientation(SwingConstants.VERTICAL);
        volume.setToolTipText("Volume Control");
        volume.setPaintTicks(true);
        volume.setPaintLabels(true);
        //------------------Set it out---------------
        p.setLayout(new BoxLayout(p, BoxLayout.PAGE_AXIS));
        p.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));
        p.add(Box.createHorizontalGlue());
        p.add(Label);
        p.add(volume,BorderLayout.CENTER);
        p.add(Box.createRigidArea(new Dimension(10, 0)));
        p.add(Mute);
        //actionlistener
       volume.addChangeListener(new ChangeListener() {
        public void stateChanged(ChangeEvent e) {
        int volumeLevel = volume.getValue();
        if (volumeLevel<=15 || volumeLevel>=1)
            System.out.println(volumeLevel);
        this.pack();
        this.setVisible(true);
    /* Test */
    public static void main(String[] arg) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                volumeControl v = new volumeControl();         
and i keep getting this compile error:
compile:
run:
2009-07-28 13:14:24.975 java[23021] CFLog (0): CFMessagePort: bootstrap_register(): failed 1103 (0x44f), port = 0xe903, name = 'java.ServiceProvider'
See /usr/include/servers/bootstrap_defs.h for the error codes.
2009-07-28 13:14:24.975 java[23021] CFLog (99): CFMessagePortCreateLocal(): failed to name Mach port (java.ServiceProvider)
i'm really not sure how to fix the compile error but i think im getting this jbox ok!