Can we not store Arraylist in a File? - NotSerializableException Error

Question

Hello frnds,
wht am doing is storing Arralist object in a File.. Here is piece of code where am doing that..
public StoreData(ArrayList arrlst) {
    try {
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      File file = new File("DATA.txt");
      FileOutputStream fos = new FileOutputStream(file.getName(), false);
      ObjectOutputStream oos = (file.length() > 0) ?
          new NoHeaderOutputStream(fos) : new ObjectOutputStream(fos);
      oos.writeObject(arrlst);
      oos.flush();
      oos.close();
      fos.close();
    catch (NotSerializableException e) {
      System.out.println("Error in Serialization");
    catch (IOException e) {
      System.out.println("Error" + e);
    }But each time I run code.. it gives NotSerializableException .. so I caught it.. !!
Can any one tell me is there any way to store Arraylist?.. or what am doing wrong!!
Thanks in advance
gervini

Answer 1

Inside Arraylist is object of Profile Collection--> Inside that is SpriteFrameCollection--> SpriteFrame--> Sprite
I am new to java.. Have to take care of many sprites in a frame.. then many frames in Frame collection.. and finally many frame collection..
Am finally storing ProfileCollection Object in Arraylist.. is that wrong way??
Please help.. am really too much confused!!
public class ProfileCollection { // Consisting of many frames..
  ArrayList profilelist = new ArrayList(); // Arraylist of many frames
  String pname;
  void addFrameCollection(int index, SpriteFrameCollection framecoll) {
    profilelist.add(index, framecoll);
public class SpriteFrameCollection { // Consisting of many frames..
  ArrayList spriteframelist = new ArrayList(); // Arraylist of many frames
  String aname;
  int fps;
  void addSpriteFrame(int index, SpriteFrame spriteframe) {
    spriteframelist.add(index, spriteframe);
public class SpriteFrame { // Full One Frame consisting of many sprites..
  ArrayList spritelist = new ArrayList(); // arraylist containing many sprites
  ImageIcon icon = null; // arraylist containing whole frame as ImageIcon
  int frameno = -1;
  void addSprite(Sprite sprite) {
    spritelist.add(sprite);
}// And Finally.. Sprite Class
public class Sprite               // Each single sprite
     Image img;
     File file;                 // is filepath where this sprite is located
     int xcord,ycord;           // xcoord,ycoord are real position in frame
     int numberinfile;           // this is the position of the sprite in the raw file
        int mirrorh, mirrorv;      // for normal=00,horizontal=10,vertical=01,both=11
        int bitno;
        boolean transparent;
     void newSprite(Image img, File file, int xcord, int ycord, int numberinfile, int mirrorh, int mirrorv, int bitno, boolean transparent)
          this.img = img;
          this.file = file;
          this.xcord = xcord;
          this.ycord = ycord;
          this.numberinfile = numberinfile;
          this.mirrorh = mirrorh;
          this.mirrorv = mirrorv;
                this.bitno = bitno;
                this.transparent = transparent;
     public Sprite(){}
}gervini