using a bean

I have built a java bean that contains a jslider, it is to be used to set and change the value of a color in a circle. I'm having trouble accessing my getter in the bean because I get a compile error:

C:\Candy\Java\CircleTest.java:57: cannot resolve symbol
symbol : method getValue ()
location: class BlueSliderBean
blue.getValue();
^
Here is what the code looks like:

What do I need to do to access getValue()

Things to check:

Is there really a method called getValue() which takes no arguments? Capitalization and spelling count!

Is it in the BlueSliderBean class?

Is it public?

The answer is "yes" to all of these things.

Well, the compiler seems to disagree. Can we see the code for BlueSliderBean?

import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import javax.swing.*;
import javax.swing.event.*;
public class BlueSliderBean
{
public static void main (String[] args)
{
BlueSliderBeanFrame frame = new BlueSliderBeanFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.show();
}
}
class BlueSliderBeanFrame extends JFrame implements DocumentListener
{
public static final int DEFAULT_WIDTH = 350;
public static final int DEFAULT_HEIGHT = 100;
JSlider slider = new JSlider(0,255);
private JPanel sliderPanel;
private JLabel integerlbl;
private JTextField textField;
private ChangeListener listener;
private int value = 0;

public BlueSliderBeanFrame()
{
setTitle("BlueSliderBean");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
sliderPanel = new JPanel();
sliderPanel.setLayout(new FlowLayout(FlowLayout.LEFT));
//listens for slider
listener = new ChangeListener()
{
public void stateChanged(ChangeEvent event)
{
//update text field when the slider value changes
JSlider source = (JSlider)event.getSource();
if (source.getValueIsAdjusting())
{
int fps = (int)source.getValue();
}
integerlbl.setText("" + source.getValue());
}
};
//add a filled slider
slider.setPaintTicks(true);
slider.setMajorTickSpacing(20);
slider.setMinorTickSpacing(5);
slider.putClientProperty("JSlider.isFilled", Boolean.TRUE);
addSlider(slider, "Filled");

//add the text field that displays the slider value
integerlbl = new JLabel();
textField = new JTextField(2);
textField.getDocument().addDocumentListener(this);
Container contentPane = getContentPane();
contentPane.add(sliderPanel, BorderLayout.CENTER);
contentPane.add(textField, BorderLayout.EAST); //Need actionlistener
contentPane.add(integerlbl, BorderLayout.SOUTH);
}//close constructor
public void changedUpdate(DocumentEvent e){}
public void insertUpdate(DocumentEvent e)
{ updateSlider();
}
public void removeUpdate(DocumentEvent e)
{
updateSlider();
}
private void updateSlider()
{
int val = 0;
try
{
val = Integer.parseInt(textField.getText());
}
catch (NumberFormatException e)
{ //fix if you wish
}
slider.setValue(val);
}
public void propertyChange(PropertyChangeEvent e)
{
if (textField.equals(e.getPropertyName()))
{
Number value = (Number)e.getNewValue();
if (slider != null && value != null)
{
slider.setValue(value.intValue());
}
}
}
public void addSlider(JSlider s, String description)
{
s.addChangeListener(listener);
JPanel panel = new JPanel();
panel.add(s);
panel.add(new JLabel(description));
sliderPanel.add(panel);
}
public void setValue(int val)
{
value = val;
}
public int getValue()
{
return value;
}
}//close SliderBeanFrame

You've shown me two classes here, BlueSliderBean and BlueSliderBeanFrame. BlueSliderBean only has a main() routine. All the other methods are in BlueSliderBeanFrame; so in your original code snippet showing the error,

the compiler is absolutely right to say there's no blue.getValue().
P.S. Please use those UBB "Code" tags!

Ok, I have taken out the class that had the main and change the BlueSliderBeanFrame to BlueSliderBean but I still get the same error. Any more suggestions?

class BlueSliderBean extends JFrame implements DocumentListener
{
public static final int DEFAULT_WIDTH = 350;
public static final int DEFAULT_HEIGHT = 100;
JSlider slider = new JSlider(0,255);
private JPanel sliderPanel;
private JLabel integerlbl;
private JTextField textField;
private ChangeListener listener;
private int value = 0;
public BlueSliderBean()
{
//setTitle("BlueSliderBean");
//setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
sliderPanel = new JPanel();
sliderPanel.setLayout(new FlowLayout(FlowLayout.LEFT));
//listens for slider
listener = new ChangeListener()
{
public void stateChanged(ChangeEvent event)
{
//update text field when the slider value changes
JSlider source = (JSlider)event.getSource();
if (source.getValueIsAdjusting())
{
    int fps = (int)source.getValue();
}
integerlbl.setText("" + source.getValue());
}
};
//add a filled slider
slider.setPaintTicks(true);
slider.setMajorTickSpacing(20);
slider.setMinorTickSpacing(5);
slider.putClientProperty("JSlider.isFilled", Boolean.TRUE);
addSlider(slider, "Filled");

//add the text field that displays the slider value
integerlbl = new JLabel();
textField = new JTextField(2);
textField.getDocument().addDocumentListener(this);
Container contentPane = getContentPane();
contentPane.add(sliderPanel, BorderLayout.CENTER);
contentPane.add(textField, BorderLayout.EAST); //Need actionlistener
contentPane.add(integerlbl, BorderLayout.SOUTH);
}//close constructor
public void changedUpdate(DocumentEvent e){}
public void insertUpdate(DocumentEvent e)
{    updateSlider();
}
public void removeUpdate(DocumentEvent e)
{
updateSlider();
}
private void updateSlider()
{
int val = 0;
    try
    {
val = Integer.parseInt(textField.getText());
}
catch (NumberFormatException e)
{          //fix if you wish
}
slider.setValue(val);
}
public void propertyChange(PropertyChangeEvent e)
{
    if (textField.equals(e.getPropertyName()))
{
    Number value = (Number)e.getNewValue();
if (slider != null && value != null)
{
   slider.setValue(value.intValue());
}
}
}
public void addSlider(JSlider s, String description)
{
s.addChangeListener(listener);
JPanel panel = new JPanel();
panel.add(s);
panel.add(new JLabel(description));
sliderPanel.add(panel);
}
public void setValue(int val)
{
value = val;
}
public int getValue()
{
return value;
}
}//close SliderBeanFrame

I have that part of the bean working. Thanks for your help.
Can you help with this problem?
The slider that I made in the bean doesn't show on the text program. Here is the code for the test:

import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
public class CircleTest
{
public static void main (String[] args)
{
DrawFrame frame = new DrawFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.show();
}
}//close CircleTest
class DrawFrame extends JFrame
{
public static final int DEFAULT_WIDTH = 400;
public static final int DEFAULT_HEIGHT = 400;
public DrawFrame()
{
setTitle("CircleTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
//add panel to frame
DrawPanel panel = new DrawPanel();
Container contentPane = getContentPane();
contentPane.add(panel);
}//close constructor
}//close DrawFrame
class DrawPanel extends JPanel
{
public void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
//draw a rectangle
double leftX = 100;
double topY = 100;
double width = 100;
double height = 75;
Rectangle2D rect = new Rectangle2D.Double(leftX, topY, width, height);
//draw a circle with the same center
double centerX = rect.getCenterX();
double centerY = rect.getCenterY();
double radius = 75;
Ellipse2D circle = new Ellipse2D.Double();
circle.setFrameFromCenter(centerX, centerY, centerX + radius, centerY + radius);
BlueSliderBean blue = new BlueSliderBean();
int blueValue = blue.getValue();
RedSliderBean red = new RedSliderBean();
int redValue = red.getValue();
GreenSliderBean green = new GreenSliderBean();
int greenValue = red.getValue();
g2.setPaint(new Color(redValue,greenValue,blueValue)); //a dull blue
g2.fill(circle);
}//close paintComponent
}//close DrawPanel