Arraylist issue: pass all the arrayList `s object to other arrayList ...

hi all...i hope somebody could show me some direction on my problem...i want to pass a arraylist `s cd information to an other arraylist
and save the new arraylist `s object to a file...i try to solve for a long ..pls help...
import java.text.*;
import java.util.*;
import java.io.*;
public class Demo{
     readOperation theRo = new readOperation();
     errorCheckingOperation theEco = new errorCheckingOperation();
     ArrayList<MusicCd>  MusicCdList;
     private void heading()
          System.out.println("\tTesting read data from console, save to file, reopen that file\t");
     private void readDataFromConsole()
     //private void insertCd()
        MusicCdList = new ArrayList<MusicCd>( ); 
        MusicCd theCd;
        int muiseCdsYearOfRelease;
        int validMuiseCdsYearOfRelease;
        String muiseCdsTitle;
          while(true)
                String continueInsertCd = "Y";
               do
                    muiseCdsTitle = theRo.readString("Please enter your CD`s title : ");
                    muiseCdsYearOfRelease = theRo.readInt("Please enter your CD`s year of release : ");
                    validMuiseCdsYearOfRelease = theEco.errorCheckingInteger(muiseCdsYearOfRelease, 1000, 9999);
                    MusicCdList.add(new MusicCd(muiseCdsTitle, validMuiseCdsYearOfRelease));//i try add the cd`s information to the arrayList
                    MusicCdList.trimToSize();
                    //saveToFile(MusicCdList);
                    continueInsertCd = theRo.readString("Do you have another Cd ? (Y/N) : ");
               }while(continueInsertCd.equals("Y") || continueInsertCd.equals("y") );
               if(continueInsertCd.equals("N") || continueInsertCd.equals("n"));
                                                //MusicCdList.add(new MusicCd(muiseCdsTitle, muiseCdsYearOfRelease));                              
                    break;
                  //System.out.println("You `ve an invalid input " + continueInsertCd + " Please enter (Y/N) only!!");
     //i want to pass those information that i just add to the arrayList to file
     //I am going to pass the arraylist that contains my cd`s information to new arraylist "saveitems and save it to a file...
     //i stuck on this problem
     //how do i pass all the arrayList `s object to another arraylist ..pls help
     //it is better show me some example how to solve thx a lot
     private void saveToFile(ArrayList<MusicCd> tempItems)
          ArrayList<MusicCd> saveItems;
          saveItems = new ArrayList<MusicCd>();
          try
               File f = new File("cdData.txt");
               FileOutputStream fos = new FileOutputStream(f);
               ObjectOutputStream oos = new ObjectOutputStream(fos);
               saveItems.add(ArrayList<MusicCd> tempItems);
               //items.add("Second item.");
               //items.add("Third item.");
               //items.add("Blah Blah.");
               oos.writeObject(items);
               oos.close();
          catch (IOException ioe)
               ioe.printStackTrace();
          try
               File g = new File("test.fil");
               FileInputStream fis = new FileInputStream(g);
               ObjectInputStream ois = new ObjectInputStream(fis);
               ArrayList<String> stuff = (ArrayList<String>)ois.readObject();
               for( String s : stuff ) System.out.println(s);
               ois.close();
          catch (Exception ioe)
               ioe.printStackTrace();
     public static void main(String[] args)
          Demo one = new Demo();
          one.readDataFromConsole();
          //one.saveToFile();
          //the followring code for better understang
import java.io.Serializable;
public class MusicCd implements Serializable
     private String musicCdsTitle;
        private int yearOfRelease;
     public MusicCd()
          musicCdsTitle = "";
          yearOfRelease = 1000;
     public MusicCd(String newMusicCdsTitle, int newYearOfRelease)
          musicCdsTitle = newMusicCdsTitle;
          yearOfRelease = newYearOfRelease;
     public String getTitle()
          return musicCdsTitle;
     public int getYearOfRelease()
          return yearOfRelease;
     public void setTitle(String newMusicCdsTitle)
          musicCdsTitle = newMusicCdsTitle;
     public void setYearOfRelease(int newYearOfRelease)
          yearOfRelease = newYearOfRelease;
     public boolean equalsName(MusicCd otherCd)
          if(otherCd == null)
               return false;
          else
               return (musicCdsTitle.equals(otherCd.musicCdsTitle));
     public String toString()
          return("Music Cd`s Title: " + musicCdsTitle + "\t"
                 + "Year of release: " + yearOfRelease + "\t");
     public ArrayList<MusicCd> getMusicCd(ArrayList<MusicCd> tempList)
          return new ArrayList<MusicCd>(ArrayList<MusicCd> tempList);
import java.util.Scanner;
import java.util.InputMismatchException;
import java.util.NoSuchElementException;
public class errorCheckingOperation
     public int errorCheckingInteger(int checkThing, int lowerBound, int upperBound)
           int aInt = checkThing;
           try
                while((checkThing < lowerBound ) || (checkThing > upperBound) )
                     throw new Exception("Invaild value....Please enter the value between  " +  lowerBound + " & " +  upperBound );
           catch (Exception e)
             String message = e.getMessage();
             System.out.println(message);
           return aInt;
       public int errorCheckingSelectionValue(String userInstruction)
            int validSelectionValue = 0;
            try
                 int selectionValue;
                 Scanner scan = new Scanner(System.in);
                 System.out.print(userInstruction);
                 selectionValue = scan.nextInt();
                 validSelectionValue = errorCheckingInteger(selectionValue , 1, 5);
           catch (NoSuchElementException e)
               //if no line was found
               System.out.println("\nNoSuchElementException error occurred (no line was found) " + e);
          catch (IllegalStateException e)
               // if this scanner is closed
               System.out.println("\nIllegalStateException error occurred (scanner is closed)" + e);
          return validSelectionValue;
import java.util.*;
public class readOperation{
     public String readString(String userInstruction)
          String aString = null;
          try
                     Scanner scan = new Scanner(System.in);
               System.out.print(userInstruction);
               aString = scan.nextLine();
          catch (NoSuchElementException e)
               //if no line was found
               System.out.println("\nNoSuchElementException error occurred (no line was found) " + e);
          catch (IllegalStateException e)
               // if this scanner is closed
               System.out.println("\nIllegalStateException error occurred (scanner is closed)" + e);
          return aString;
     public char readTheFirstChar(String userInstruction)
          char aChar = ' ';
          String strSelection = null;
          try
               //char charSelection;
                     Scanner scan = new Scanner(System.in);
               System.out.print(userInstruction);
               strSelection = scan.next();
               aChar =  strSelection.charAt(0);
          catch (NoSuchElementException e)
               //if no line was found
               System.out.println("\nNoSuchElementException error occurred (no line was found) " + e);
          catch (IllegalStateException e)
               // if this scanner is closed
               System.out.println("\nIllegalStateException error occurred (scanner is closed)" + e);
          return aChar;
     public int readInt(String userInstruction) {
          int aInt = 0;
          try {
               Scanner scan = new Scanner(System.in);
               System.out.print(userInstruction);
               aInt = scan.nextInt();
          } catch (InputMismatchException e) {
               System.out.println("\nInputMismatchException error occurred (the next token does not match the Integer regular expression, or is out of range) " + e);
          } catch (NoSuchElementException e) {
               System.out.println("\nNoSuchElementException error occurred (input is exhausted)" + e);
          } catch (IllegalStateException e) {
               System.out.println("\nIllegalStateException error occurred (scanner is closed)" + e);
          return aInt;
}

sorry for my not-clear descprtion...thc for your help....i got a problem on store some data to a file ....u can see my from demo..
Step1: i try to prompt the user to enter his/her cd `s information
and i pass those cd `s information to an object "MuiscCd" ..and i am going to add this "MuiscCd" to the arrayList " MusicCdList ". i am fine here..
Step2: and i want to save the object that `s in my arrayList " MusicCdList " to a file....i got stuck here..<_> ..(confused).
Step3:
i will reopen the file and print it out..(here i am alright )

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