I am having a problem compiling my program that I think is related to
my classpath. All of my swing components create unresolved symbols in
their declarations. Here are my compile errors:

C:\Documents and Settings\Michael\My
Documents\School\CSC3360\Concentration>java
c Concentration.java
Concentration.java:18: cannot resolve symbol
symbol  : class Jframe
location: class Concentration
               Jframe f = new ConcentrationFrame("Concentration");
               ^
.\ConcentrationFrame.java:16: cannot resolve symbol
symbol  : class Jframe
location: class ConcentrationFrame
public class ConcentrationFrame extends Jframe {
                                       ^
.\ConcentrationFrame.java:18: cannot resolve symbol
symbol  : class Jpanel
location: class ConcentrationFrame
       private Jpanel centerPanel =
               ^
.\ConcentrationFrame.java:20: cannot resolve symbol
symbol  : class Jpanel
location: class ConcentrationFrame
       private Jpanel buttonPanel =
               ^
.\ConcentrationFrame.java:22: cannot resolve symbol
symbol  : class Jlabel
location: class ConcentrationFrame
       private Jlabel statusLabel =
               ^
.\ConcentrationFrame.java:19: cannot resolve symbol
symbol  : class Jpanel
location: class ConcentrationFrame
               new Jpanel(new FlowLayout(FlowLayout.CENTER, 20, 20));
                   ^
.\ConcentrationFrame.java:21: cannot resolve symbol
symbol  : class Jpanel
location: class ConcentrationFrame
               new Jpanel(new GridLayout(4, 6, 20, 20));
                   ^
.\ConcentrationFrame.java:36: cannot resolve symbol
symbol  : method setBackground (java.awt.Color)
location: class ConcentrationFrame
               setBackground(new Color(255, 255, 255));
               ^
.\ConcentrationFrame.java:58: cannot resolve symbol
symbol  : variable f
location: class ConcentrationFrame
               Container contentPane = f.getContentPane();
                                       ^
.\ConcentrationFrame.java:65: cannot resolve symbol
symbol  : variable EXIT_ON_CLOSE
location: class ConcentrationFrame
               setDefaultCloseOperation(EXIT_ON_CLOSE);
                                        ^
10 errors

As you can see, I am not certain that the compiler is seeing the
javax.swing file in the classpath. I had this problem before in a
program using only awt and changed both my path and classpath to the
following:

PATH = C:\j2sdk1.4.2_05\bin;C:\Program Files\SSH Communications
Security\SSH Secure Shell
CLASSPATH = .;C:\Program Files\Java\j2re1.4.1\lib\ext\QTJava.zip

Everything before the semicolon was added to both environment
variables by me to resolve the compilation issues I had with the
previous program. However, that program compiles fine now. Please
help!

Here is the driver class. The helper class imports the same packages.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;

// Driver class
public class Concentration {
    public static void main(String[] args) {
        Jframe f = new ConcentrationFrame("Concentration");
        Dimension screenSize =
            Toolkit.getDefaultToolkit().getScreenSize();
        Dimension frameSize = f.getSize();
        f.setLocation((screenSize.width - frameSize.width) / 2,
            (screenSize.height - frameSize.height) / 2);
        f.pack();
        f.setVisible(true);
    }
}

Hope this helps.