Help with instances

Question

i am building a project that will manage a group of recordings. I Have a class 'Gui' which is used to display the current recording and i am trying to use the class 'addframe' to give the option to add a CD or Digital type of recording to the manager class. i want to use a dialogue box to take input for the attributes of the recording and then to be able to delete the current recording using the delete button on the gui class. However i am now well and truly stuck and any advice would be much appreciated
ALL CLASSES BELOW
Recording Class
import java.util.*;
public class Recording
   /* Declare Variables */
    private String Title,Artist,Genre;
    public Recording()
        Title = "n/a";
        Artist = "n/a";
        Genre = "n/a";
    public Recording(String theTitle, String theArtist, String theGenre)
        Title = theTitle;
        Artist = theArtist;
        Genre = theGenre;
    public void setTitle(String theTitle)
        Title = theTitle;
    public void setArtist(String theArtist)
        Artist = theArtist;
    public void setGenre(String theGenre)
        Genre = theGenre;
    public String getTitle()
        return Title;
    public String getArtist()
        return Artist;
    public String getGenre()
        return Genre;
   public String toString()
       return("Title,"+ Title +" Artist," + Artist + " Genre," + Genre);
CD Class
public class CD extends Recording {
    /** Creates a new instance of CD */
   int serial;
    public CD(String theTitle, String theArtist, String theGenre,int theserial)
    super(theTitle, theArtist, theGenre);
    this.serial = theserial;
    public int getSerial()
        return serial;
   public void setSerial(int theserial)
       serial = theserial;
   public String toString()
       String s = super.toString();
       s = s + "\n Serial Number" +serial;
       return s;
Digital Class
public class Digital extends Recording {
    /** Creates a new instance of CD */
   String Type;
public Digital(String theTitle, String theArtist, String theGenre,String theType)
    super(theTitle, theArtist, theGenre);
    this.Type = theType;
    public String getType()
        return Type;
   public void setType(String theType)
       Type = theType;
   public String toString()
       String s = super.toString();
       s = s + "\n Type" +Type;
       return s;
Manager Class
import java.util.*;
public class Manager {
    ArrayList<Recording> theRecordings = new ArrayList<Recording>();
    int numRecordings, maxRecordings,current;
    String managerName;
    public Manager(String Name,int Max)
        managerName = Name;
        maxRecordings = Max;
        numRecordings = 0;
        current = 0;
    public boolean addRecording(Recording theRecording)
        if(numRecordings == maxRecordings)
            return false;
        else
            theRecordings.add(theRecording);
            numRecordings++;
            return true;
    public void outputRecordings()
      System.out.println("The Recordings");
      System.out.println("--------------");
      System.out.println();
      for (Recording R: theRecordings)
          System.out.println(R);
          System.out.println();
    public String retCurrent()
        String s = " ARTIST " + theRecordings.get(current).getArtist() + "\n TITLE " +theRecordings.get(current).getTitle() +"\n GENRE " + theRecordings.get(current).getGenre();
        return s;
    public String nextRecording()
        if (current <numRecordings-1)
            current++;
            String s = " ARTIST " + theRecordings.get(current).getArtist() + "\n TITLE " +theRecordings.get(current).getTitle() +"\n GENRE " + theRecordings.get(current).getGenre();
            return s;
        else
            String s ="There Is No Next Recording";
            return s;
    public String previousRecording()
        if (current >0)
            current--;
            String s = " ARTIST " + theRecordings.get(current).getArtist() + "\n TITLE " +theRecordings.get(current).getTitle() +"\n GENRE " + theRecordings.get(current).getGenre();
            return s;
        else
            String s = "There Is No Previous Recording";
            return s;
Gui Class
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class gui extends JFrame
     private JButton Previous;
        private JButton Next;
     private TextArea OutputArea;
        private JButton Add;
     public gui (String sTitle,Manager theManager)
          super (sTitle);
          Container contentPane;
          contentPane = getContentPane();
          contentPane.setLayout(new FlowLayout());              
          Previous = new JButton("Previous");
                Next = new JButton("Next");
          OutputArea = new TextArea("Output");
                Add = new JButton("Add Recordings");
                Previous.addActionListener(new PreviousRecording(theManager,OutputArea));
                Next.addActionListener(new NextRecording(theManager,OutputArea));
                OutputArea.setText(theManager.retCurrent());
                Add.addActionListener(new addRecords(theManager));
                contentPane.add(Previous);
          contentPane.add(OutputArea);
          contentPane.add(Next);
                contentPane.add(Add);
          this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          this.setSize(800,300);
          this.setVisible(true);
public static void main(String args[])
            Manager theManager = new Manager("theManager",20);
            //create a few recordings
            Recording R1 = new Recording("Turn The Page","The Streets","Rap");
            Recording R2 = new Recording("Clubb Foot","Kasabian","Alternative");
            Recording R3 = new Recording("London Town","Kano","UK Hip-Hop");
            Recording R4 = new Recording("Artificial Sweetner","No Doubt","Rock");
            Recording R5 = new Recording("Diamonds & Guns","The Transplants","Punk");
       //Add Recordings
             theManager.addRecording(R1);
             theManager.addRecording(R2);
             theManager.addRecording(R3);
             theManager.addRecording(R4);
             theManager.addRecording(R5);
             new gui("Recordings",theManager);
Previous Recording Class
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.*;
public class PreviousRecording implements ActionListener
    Manager m;
    TextArea ta;
    PreviousRecording(Manager m,TextArea ta)
        this.m = m;
        this.ta = ta;
    public void actionPerformed(ActionEvent e)
              ta.setText(m.previousRecording());
Next Recording Class
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.*;
public class NextRecording implements ActionListener
    Manager m;
    TextArea ta;
    NextRecording(Manager m,TextArea ta)
        this.m = m;
        this.ta = ta;
    public void actionPerformed(ActionEvent e)
        ta.setText(m.nextRecording());
Add Records Class
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.*;
public class addRecords implements ActionListener
    Manager m;
    addRecords(Manager m)
        this.m = m;
    public void actionPerformed(ActionEvent e)
    new AddFrame("Add Recording",m);
Add Frame Class
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class AddFrame extends JFrame
    private JButton addCD;
    private JButton addDig;
    Manager theManager;
    public AddFrame(String sTitle,Manager M)
     super (sTitle);
        this.theManager = M;
        Container contentPane;
     contentPane = getContentPane();
     contentPane.setLayout(new FlowLayout());
        addCD = new JButton("Add CD Recording");
        addDig = new JButton("Add Digital Recording");
        contentPane.add(addCD);
        contentPane.add(addDig);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     this.setSize(800,300);
     this.setVisible(true);
Add CD Class
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.*;
public class AddCD implements ActionListener
    Manager m;
    AddCD(Manager m)
        this.m = m;
    public void actionPerformed(ActionEvent e)
        m.addRecording();
Add Digital Class
//not yet written

Answer 1

I am not going to scroll through your code but let me make some suggestions.
*CD or Digital implies (to me, anyway) that radio buttons would work well as selectors.
*I would enter attributes of a recording in individual text boxes: one for artist, one for producer, and so on.
*If you have a container of recordings, there is no need to delete the current reference.  Simply replace the
the var that points to it with a new instance of the recording.
*Instead of posting lots of code, try posting a small self-contained example.