Problems compiling program

Question

hello.
this is james mcfadden. i'm having problems compiling the Demo.java program. the Demo.java program is shown below along with the MediaPanel.java and MediaTest.java programs. when i compile the Demo.java program i get the following errors. i really need help in getting rid of these errors.
----jGRASP exec: javac -g X:\CP4B Project\Demo.java
Demo.java:297: cannot find symbol
symbol : class Media
location: class Demo
MediaTest media=new Media();
^
Demo.java:301: cannot find symbol
symbol : class Media
location: class Demo
MediaTest media=new Media();
^
Demo.java:305: cannot find symbol
symbol : class Media
location: class Demo
MediaTest media=new Media();
^
3 errors
----jGRASP wedge2: exit code for process is 1.
----jGRASP: operation complete.
//Written by:Seamus McFadden
//Class:CP4B
//Program Number:1
//Program Name:Demo.java
//Description:
//Supervisor:Gerard McCloskey
import java.awt.*;//Contains all of the classes for creating user interfaces and for painting graphics and images
import java.awt.event.*;//Provides interfaces and classes for dealing with different types of events fired by AWT components
import javax.swing.*;//Provides a set of lightweight components that, to the maximum degree possible, work the same on all platforms
public class Demo extends JFrame{
    public static void main(String[] args){
        int choice=-1;//a variable of type int that is set to -1
        choice=getChoice();//invokes the method getChoice()
        if(choice!=0){
           getSelected(choice);//invokes the method getSelected(choice)
        }//end if
    }//end main
    public static int getChoice(){
        String choice;//a variable of type string
        int ch;//a variable of type int
        choice=JOptionPane.showInputDialog(null,
                "1. Product Menu\n" +
                "2. Member Menu\n" +
                "3. Rental Menu\n" +
                      "4. Media Menu\n" +
                "5. Log Off\n\n" +
                "Enter your choice");//asks the user for some input
        ch=Integer.parseInt(choice);//a class that wraps a value of the primitive type int in an object
        return ch;//a method that returns an integer value
    }//end getChoice
    public static void getSelected(int choice){
        if(choice == 1) {
               product();
        }//end if
        if(choice==2){
           member();
        }//end if
        if(choice==3){
           rental();
        }//end if
            if(choice==4){
           media();
        }//end if
            if(choice==5){
               LogOff logoff=new LogOff();
            }//end if
            else{
               ErrorMessage error=new ErrorMessage();
    }//end getSelected
    public static void product(){
         int productChoice=-1;//a variable of type int that is set to -1
       productChoice=getProductChoice();//invokes the method getChoice()
       if(productChoice!=0){
          getProductSelected(productChoice);//invokes the method getSelected(choice)
       }//end if
       getChoice(); 
    public static void member(){
       int memberChoice=-1;//a variable of type int that is set to -1
       memberChoice=getMemberChoice();//invokes the method getChoice()
       if(memberChoice!=0){
          getMemberSelected(memberChoice);//invokes the method getSelected(choice)
       }//end if
       getChoice(); 
    public static void rental(){
       int rentalChoice=-1;//a variable of type int that is set to -1
       rentalChoice=getRentalChoice();//invokes the method getChoice()
       if(rentalChoice!=0){
          getRentalSelected(rentalChoice);//invokes the method getSelected(choice)
       }//end if
       getChoice();
      public static void media(){
       int mediaChoice=-1;//a variable of type int that is set to -1
       mediaChoice=getMediaChoice();//invokes the method getChoice()
       if(mediaChoice!=0){
          getMediaSelected(mediaChoice);//invokes the method getSelected(choice)
       }//end if
       getChoice(); 
      public static int getProductChoice(){
       String productChoice;//a variable of type string
       int pch;//a variable of type int
       productChoice=JOptionPane.showInputDialog(null,
               "1. Add product details\n" +
               "2. View product details\n" +
               "3. Edit product details\n" +
                     "4. Delete product details\n" +
               "5. Return to main menu\n\n" +
               "Enter your choice");//asks the user for some input
       pch=Integer.parseInt(productChoice);//a class that wraps a value of the primitive type int in an object
       return pch;//a method that returns an integer value
    }//end getProductChoice
      public static int getMemberChoice(){
       String memberChoice;//a variable of type string
       int mch;//a variable of type int
       memberChoice=JOptionPane.showInputDialog(null,
               "1. Add member details\n" +
               "2. View member details\n" +
               "3. Edit member details\n" +
                         "4. Delete member details\n" +
               "5. Return to main menu\n\n" +
               "Enter your choice");//asks the user for some input
       mch=Integer.parseInt(memberChoice);//a class that wraps a value of the primitive type int in an object
       return mch;//a method that returns an integer value
    }//end getMemberChoice
      public static int getRentalChoice(){
       String rentalChoice;//a variable of type string
       int rch;//a variable of type int
       rentalChoice=JOptionPane.showInputDialog(null,
               "1. Add rental details\n" +
               "2. View rental details\n" +
               "3. Edit rental details\n" +
                         "4. Delete rental details\n" +
               "5. Return to main menu\n\n" +
               "Enter your choice");//asks the user for some input
       rch=Integer.parseInt(rentalChoice);//a class that wraps a value of the primitive type int in an object
       return rch;//a method that returns an integer value
    }//end getRentalChoice
      public static int getMediaChoice(){
       String mediaChoice;//a variable of type string
       int mtch;//a variable of type int
       mediaChoice=JOptionPane.showInputDialog(null,
               "1. Listen to songs\n" +
                         "2. View movie previews\n" +
                         "3. View game previews\n" +
               "4. Return to main menu\n\n" +
               "Enter your choice");//asks the user for some input
       mtch=Integer.parseInt(mediaChoice);//a class that wraps a value of the primitive type int in an object
       return mtch;//a method that returns an integer value
    }//end getMediaChoice
      public static void getProductSelected(int productChoice){
       if(productChoice==1){
              addProducts();
       }//end if
       if(productChoice==2){
          viewProducts();
       }//end if
       if(productChoice==3){
          editProducts();
       }//end if
           if(productChoice==4){
          deleteProducts();
       }//end if
           else{
               ErrorMessage error=new ErrorMessage();
    }//end getProductSelected
      public static void getMemberSelected(int memberChoice){
       if(memberChoice==1){
              addMembers();
       }//end if
       if(memberChoice==2){
          viewMembers();
       }//end if
       if(memberChoice==3){
          editMembers();
       }//end if
           if(memberChoice==4){
          deleteMembers();
       }//end if
           else{
               ErrorMessage error=new ErrorMessage();
    }//end getMemberSelected
      public static void getRentalSelected(int rentalChoice){
       if(rentalChoice==1){
              addRentals();
       }//end if
       if(rentalChoice==2){
          viewRentals();
       }//end if
       if(rentalChoice==3){
          editRentals();
       }//end if
           if(rentalChoice==4){
          deleteRentals();
       }//end if
           else{
               ErrorMessage error=new ErrorMessage();
    }//end getRentalSelected
      public static void getMediaSelected(int mediaChoice){
       if(mediaChoice==1){
              hearSongs();
       }//end if
       if(mediaChoice==2){
          viewMovies();
       }//end if
       if(mediaChoice==3){
          viewGames();
       }//end if
           else{
               ErrorMessage error=new ErrorMessage();
    }//end getMediaSelected
      public static void addProducts(){
       ProductForm product=new ProductForm();
       product.getInput();
           product.setVisible(true);
      public static void viewProducts(){
       DatabaseTest tt=new DatabaseTest();
           tt.setVisible(true);
      public static void editProducts(){
       ProductForm product=new ProductForm();
           product.getInput();
           product.setVisible(true);
      public static void deleteProducts(){
       ProductForm product=new ProductForm();
           product.setVisible(true);
      public static void addMembers(){
       MemberForm member=new MemberForm();
           member.getInput();
           member.setVisible(true);
      public static void viewMembers(){
       DatabaseTest tt=new DatabaseTest();
           tt.setVisible(true);
      public static void editMembers(){
       MemberForm member=new MemberForm();
           member.getInput();
           member.setVisible(true);
      public static void deleteMembers(){
       MemberForm member=new MemberForm();
           member.setVisible(true);
      public static void addRentals(){
       RentalForm rental=new RentalForm();
           rental.getInput();
           rental.setVisible(true);
      public static void viewRentals(){
       DatabaseTest tt=new DatabaseTest();
           tt.setVisible(true);
      public static void editRentals(){
       RentalForm rental=new RentalForm();
           rental.getInput();
           rental.setVisible(true);
      public static void deleteRentals(){
       RentalForm rental=new RentalForm();
           rental.setVisible(true);
    public static void hearSongs(){
       MediaTest media=new Media(); 
    public static void viewMovies(){
       MediaTest media=new Media();   
    public static void viewGames(){
       MediaTest media=new Media();   
}//end class Demo
import java.awt.BorderLayout;
import java.awt.Component;
import java.io.IOException;
import java.net.URL;
import javax.media.CannotRealizeException;
import javax.media.Manager;
import javax.media.NoPlayerException;
import javax.media.Player;
import javax.swing.JPanel;
public class MediaPanel extends JPanel{
   public MediaPanel(URL mediaURL){
      setLayout(new BorderLayout());//use a BorderLayout
      //Use lightweight components for Swing compatibility
      Manager.setHint(Manager.LIGHTWEIGHT_RENDERER,true);
      try{
         //create a player to play the media specified in the URL
         Player mediaPlayer=Manager.createRealizedPlayer(mediaURL);
         //get the components for the video and the playback controls
         Component video=mediaPlayer.getVisualComponent();
         Component controls=mediaPlayer.getControlPanelComponent();
         if(video!=null)
            add(video,BorderLayout.CENTER);//add video component
         if(controls!=null)
            add(controls,BorderLayout.SOUTH);//add controls
         mediaPlayer.start();//start playing the media clip
      }//end try
      catch(NoPlayerException noPlayerException){
         System.err.println("No media player found");
      }//end catch
      catch(CannotRealizeException cannotRealizeException){
         System.err.println("Could not realize media player");
      }//end catch
      catch(IOException iOException){
         System.err.println("Error reading from the source");
      }//end catch
   }//end MediaPanel constructor
}//end class MediaPanel
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
public class MediaTest{
   //launch the application
   public static void main(String args[]){
      //create a file chooser
      JFileChooser fileChooser=new JFileChooser();
      //show open file dialog
      int result=fileChooser.showOpenDialog(null);
      if(result==JFileChooser.APPROVE_OPTION){//user chose a file
         URL mediaURL=null;
         try{
            //get the file as URL
            mediaURL=fileChooser.getSelectedFile().toURL();
         }//end try
         catch(MalformedURLException malformedURLException){
            System.err.println("Could not create URL for the file");
         }//end catch
         if(mediaURL!=null) {//only display if there is a valid URL
            JFrame mediaTest=new JFrame("Media Tester");
            mediaTest.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            MediaPanel mediaPanel=new MediaPanel(mediaURL);
            mediaTest.add(mediaPanel);
            mediaTest.setSize(300,300);
            mediaTest.setVisible(true);
         }//end inner if
      }//end outer if
   }//end main
}//end class MediaTest

Answer 1

hello.
this is james mcfadden. thanks for the reply. i did what you told me to do, but i am still having trouble trying to use the 2 JMF programs (MediaPanel.java and MediaTest.java) with the Demo.java program. the Demo.java program compiles and runs ok, but when i press 1 (for listening to songs) in the media menu i get a JOptionPane (An Error Message) displayed on screen. how can i fix this problem?
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Demo extends JFrame{
    public static void main(String[] args){
        int choice=-1;//a variable of type int that is set to -1
        choice=getChoice();//invokes the method getChoice()
        if(choice!=0){
           getSelected(choice);//invokes the method getSelected(choice)
        }//end if
    }//end main
    public static int getChoice(){
        String choice;//a variable of type string
        int ch;//a variable of type int
        choice=JOptionPane.showInputDialog(null,
                "1. Product Menu\n" +
                "2. Member Menu\n" +
                "3. Rental Menu\n" +
                      "4. Media Menu\n" +
                "5. Log Off\n\n" +
                "Enter your choice");//asks the user for some input
        ch=Integer.parseInt(choice);//a class that wraps a value of the primitive type int in an object
        return ch;//a method that returns an integer value
    }//end getChoice
    public static void getSelected(int choice){
        if(choice == 1) {
               product();
        }//end if
        if(choice==2){
           member();
        }//end if
        if(choice==3){
           rental();
        }//end if
            if(choice==4){
           media();
        }//end if
            if(choice==5){
               LogOff logoff=new LogOff();
            }//end if
            else{
               JOptionPane.showMessageDialog(null,"Error\n\nInvalid options\nPlease choose 1, 2, 3, 4 or 5 on the main menu\nPlease choose 1, 2, 3, 4 or 5 on the product menu\nPlease choose 1, 2, 3, 4 or 5 on the member menu\nPlease choose 1, 2, 3, 4 or 5 on the rental menu\nPlease choose 1, 2, 3 or 4 on the media menu");
               System.exit(0);
    }//end getSelected
    public static void product(){
         int productChoice=-1;//a variable of type int that is set to -1
       productChoice=getProductChoice();//invokes the method getChoice()
       if(productChoice!=0){
          getProductSelected(productChoice);//invokes the method getSelected(choice)
       }//end if
       getChoice(); 
    public static void member(){
       int memberChoice=-1;//a variable of type int that is set to -1
       memberChoice=getMemberChoice();//invokes the method getChoice()
       if(memberChoice!=0){
          getMemberSelected(memberChoice);//invokes the method getSelected(choice)
       }//end if
       getChoice(); 
    public static void rental(){
       int rentalChoice=-1;//a variable of type int that is set to -1
       rentalChoice=getRentalChoice();//invokes the method getChoice()
       if(rentalChoice!=0){
          getRentalSelected(rentalChoice);//invokes the method getSelected(choice)
       }//end if
       getChoice();
      public static void media(){
       int mediaChoice=-1;//a variable of type int that is set to -1
       mediaChoice=getMediaChoice();//invokes the method getChoice()
       if(mediaChoice!=0){
          getMediaSelected(mediaChoice);//invokes the method getSelected(choice)
       }//end if
       getChoice(); 
      public static int getProductChoice(){
       String productChoice;//a variable of type string
       int pch;//a variable of type int
       productChoice=JOptionPane.showInputDialog(null,
               "1. Add product details\n" +
               "2. View product details\n" +
               "3. Edit product details\n" +
                     "4. Delete product details\n" +
               "5. Return to main menu\n\n" +
               "Enter your choice");//asks the user for some input
       pch=Integer.parseInt(productChoice);//a class that wraps a value of the primitive type int in an object
       return pch;//a method that returns an integer value
    }//end getProductChoice
      public static int getMemberChoice(){
       String memberChoice;//a variable of type string
       int mch;//a variable of type int
       memberChoice=JOptionPane.showInputDialog(null,
               "1. Add member details\n" +
               "2. View member details\n" +
               "3. Edit member details\n" +
                         "4. Delete member details\n" +
               "5. Return to main menu\n\n" +
               "Enter your choice");//asks the user for some input
       mch=Integer.parseInt(memberChoice);//a class that wraps a value of the primitive type int in an object
       return mch;//a method that returns an integer value
    }//end getMemberChoice
      public static int getRentalChoice(){
       String rentalChoice;//a variable of type string
       int rch;//a variable of type int
       rentalChoice=JOptionPane.showInputDialog(null,
               "1. Add rental details\n" +
               "2. View rental details\n" +
               "3. Edit rental details\n" +
                         "4. Delete rental details\n" +
               "5. Return to main menu\n\n" +
               "Enter your choice");//asks the user for some input
       rch=Integer.parseInt(rentalChoice);//a class that wraps a value of the primitive type int in an object
       return rch;//a method that returns an integer value
    }//end getRentalChoice
      public static int getMediaChoice(){
       String mediaChoice;//a variable of type string
       int mtch;//a variable of type int
       mediaChoice=JOptionPane.showInputDialog(null,
               "1. Listen to songs\n" +
                         "2. View movie previews\n" +
                         "3. View game previews\n" +
               "4. Return to main menu\n\n" +
               "Enter your choice");//asks the user for some input
       mtch=Integer.parseInt(mediaChoice);//a class that wraps a value of the primitive type int in an object
       return mtch;//a method that returns an integer value
    }//end getMediaChoice
      public static void getProductSelected(int productChoice){
       if(productChoice==1){
              addProducts();
       }//end if
       if(productChoice==2){
          viewProducts();
       }//end if
       if(productChoice==3){
          editProducts();
       }//end if
           if(productChoice==4){
          deleteProducts();
       }//end if
           else{
               JOptionPane.showMessageDialog(null,"Error\n\nInvalid options\nPlease choose 1, 2, 3, 4 or 5 on the main menu\nPlease choose 1, 2, 3, 4 or 5 on the product menu\nPlease choose 1, 2, 3, 4 or 5 on the member menu\nPlease choose 1, 2, 3, 4 or 5 on the rental menu\nPlease choose 1, 2, 3 or 4 on the media menu");
               System.exit(0);
    }//end getProductSelected
      public static void getMemberSelected(int memberChoice){
       if(memberChoice==1){
              addMembers();
       }//end if
       if(memberChoice==2){
          viewMembers();
       }//end if
       if(memberChoice==3){
          editMembers();
       }//end if
           if(memberChoice==4){
          deleteMembers();
       }//end if
           else{
               JOptionPane.showMessageDialog(null,"Error\n\nInvalid options\nPlease choose 1, 2, 3, 4 or 5 on the main menu\nPlease choose 1, 2, 3, 4 or 5 on the product menu\nPlease choose 1, 2, 3, 4 or 5 on the member menu\nPlease choose 1, 2, 3, 4 or 5 on the rental menu\nPlease choose 1, 2, 3 or 4 on the media menu");
               System.exit(0);
    }//end getMemberSelected
      public static void getRentalSelected(int rentalChoice){
       if(rentalChoice==1){
              addRentals();
       }//end if
       if(rentalChoice==2){
          viewRentals();
       }//end if
       if(rentalChoice==3){
          editRentals();
       }//end if
           if(rentalChoice==4){
          deleteRentals();
       }//end if
           else{
               JOptionPane.showMessageDialog(null,"Error\n\nInvalid options\nPlease choose 1, 2, 3, 4 or 5 on the main menu\nPlease choose 1, 2, 3, 4 or 5 on the product menu\nPlease choose 1, 2, 3, 4 or 5 on the member menu\nPlease choose 1, 2, 3, 4 or 5 on the rental menu\nPlease choose 1, 2, 3 or 4 on the media menu");
               System.exit(0);
    }//end getRentalSelected
      public static void getMediaSelected(int mediaChoice){
       if(mediaChoice==1){
              hearSongs();
       }//end if
       if(mediaChoice==2){
          viewMovies();
       }//end if
       if(mediaChoice==3){
          viewGames();
       }//end if
           else{
               JOptionPane.showMessageDialog(null,"Error\n\nInvalid options\nPlease choose 1, 2, 3, 4 or 5 on the main menu\nPlease choose 1, 2, 3, 4 or 5 on the product menu\nPlease choose 1, 2, 3, 4 or 5 on the member menu\nPlease choose 1, 2, 3, 4 or 5 on the rental menu\nPlease choose 1, 2, 3 or 4 on the media menu");
               System.exit(0);
    }//end getMediaSelected
      public static void addProducts(){
       ProductForm product=new ProductForm();
       product.getInput();
           product.setVisible(true);
      public static void viewProducts(){
       DatabaseTest tt=new DatabaseTest();
           tt.setVisible(true);
      public static void editProducts(){
       ProductForm product=new ProductForm();
           product.getInput();
           product.setVisible(true);
      public static void deleteProducts(){
       ProductForm product=new ProductForm();
           product.setVisible(true);
      public static void addMembers(){
       MemberForm member=new MemberForm();
           member.getInput();
           member.setVisible(true);
      public static void viewMembers(){
       DatabaseTest tt=new DatabaseTest();
           tt.setVisible(true);
      public static void editMembers(){
       MemberForm member=new MemberForm();
           member.getInput();
           member.setVisible(true);
      public static void deleteMembers(){
       MemberForm member=new MemberForm();
           member.setVisible(true);
      public static void addRentals(){
       RentalForm rental=new RentalForm();
           rental.getInput();
           rental.setVisible(true);
      public static void viewRentals(){
       DatabaseTest tt=new DatabaseTest();
           tt.setVisible(true);
      public static void editRentals(){
       RentalForm rental=new RentalForm();
           rental.getInput();
           rental.setVisible(true);
      public static void deleteRentals(){
       RentalForm rental=new RentalForm();
           rental.setVisible(true);
    public static void hearSongs(){
       MediaTest media=new MediaTest(); 
    public static void viewMovies(){
       MediaTest media=new MediaTest();   
    public static void viewGames(){
       MediaTest media=new MediaTest();   
}//end class Demo
import java.awt.BorderLayout;
import java.awt.Component;
import java.io.IOException;
import java.net.URL;
import javax.media.CannotRealizeException;
import javax.media.Manager;
import javax.media.NoPlayerException;
import javax.media.Player;
import javax.swing.JPanel;
public class MediaPanel extends JPanel{
   public MediaPanel(URL mediaURL){
      setLayout(new BorderLayout());//use a BorderLayout
      //Use lightweight components for Swing compatibility
      Manager.setHint(Manager.LIGHTWEIGHT_RENDERER,true);
      try{
         //create a player to play the media specified in the URL
         Player mediaPlayer=Manager.createRealizedPlayer(mediaURL);
         //get the components for the video and the playback controls
         Component video=mediaPlayer.getVisualComponent();
         Component controls=mediaPlayer.getControlPanelComponent();
         if(video!=null)
            add(video,BorderLayout.CENTER);//add video component
         if(controls!=null)
            add(controls,BorderLayout.SOUTH);//add controls
         mediaPlayer.start();//start playing the media clip
      }//end try
      catch(NoPlayerException noPlayerException){
         System.err.println("No media player found");
      }//end catch
      catch(CannotRealizeException cannotRealizeException){
         System.err.println("Could not realize media player");
      }//end catch
      catch(IOException iOException){
         System.err.println("Error reading from the source");
      }//end catch
   }//end MediaPanel constructor
}//end class MediaPanel
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
public class MediaTest{
   //launch the application
   public static void main(String args[]){
      //create a file chooser
      JFileChooser fileChooser=new JFileChooser();
      //show open file dialog
      int result=fileChooser.showOpenDialog(null);
      if(result==JFileChooser.APPROVE_OPTION){//user chose a file
         URL mediaURL=null;
         try{
            //get the file as URL
            mediaURL=fileChooser.getSelectedFile().toURL();
         }//end try
         catch(MalformedURLException malformedURLException){
            System.err.println("Could not create URL for the file");
         }//end catch
         if(mediaURL!=null) {//only display if there is a valid URL
            JFrame mediaTest=new JFrame("Media Tester");
            mediaTest.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            MediaPanel mediaPanel=new MediaPanel(mediaURL);
            mediaTest.add(mediaPanel);
            mediaTest.setSize(300,300);
            mediaTest.setVisible(true);
         }//end inner if
      }//end outer if
   }//end main
}//end class MediaTest