java ser and des

import java.util.*;
import java.io.*;

public class Colegiu implements Serializable {

    public static void main(String[] args) throws ClassNotFoundException {

        int i;
        Item[] items = new Item[2];

        Colegiu c = new Colegiu();
        for (i = 0; i < items.length; i++) {

            items[i] = c.new Item();
        }

        items[0].setItemID("ITEM101");
        items[1].setItemID("ITEM102");

        items[0].setDesc("iPad");
        items[1].setDesc("iPhone");

        items[0].setCost(499);
        items[1].setCost(599);

        items[0].setQuantity(1);
        items[1].setQuantity(3);

        System.out.println("Item Detalii.....");
        for (Item d : items) {
            System.out.print(d.getItemID());
            System.out.print("\t" + d.getDesc());
            System.out.print("\t" + d.getCost());
            System.out.println("\t" + d.getQuantity());
        }

        List<Item> obj;
        obj = new ArrayList<Item>();

        for (i = 0; i < items.length; i++) {
            obj.add(items[i]);
        }

        // Sa facem serializarea unui obiect
        try {
            FileOutputStream fileOut = new FileOutputStream("out.txt");
            ObjectOutputStream out = new ObjectOutputStream(fileOut);
            out.writeObject(obj);
            out.close();
            fileOut.close();
            System.out.println("\nSerializare Succes ... Verificati fisierul de iesire specificat ..\n");

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        // Aici deserializam un Obiect
        try {
            FileInputStream fileIn = new FileInputStream("out.txt");
            ObjectInputStream in = new ObjectInputStream(fileIn);
            System.out.println("Datele deserializate: \n" + in.readObject().toString());
            in.close();
            fileIn.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public class Item implements Serializable {

        private String itemID;
        private String desc;
        private double cost;
        private int quantity;

        public Item() {
            itemID = "";
            desc = "";
            cost = 0;
            quantity = 0;
        }

        public Item(String id, String d, double c, int q) {
            itemID = id;
            desc = d;
            cost = c;
            quantity = q;

        }

        public String getItemID() {
            return itemID;
        }

        public void setItemID(String itemID) {
            this.itemID = itemID;
        }

        public String getDesc() {
            return desc;
        }

        public void setDesc(String desc) {
            this.desc = desc;
        }

        public double getCost() {
            return cost;
        }

        public void setCost(double cost) {
            this.cost = cost;
        }

        public int getQuantity() {
            return quantity;
        }

        public void setQuantity(int quantity) {
            this.quantity = quantity;
        }

        public String toString() {
            return "Item [itemID=" + itemID + ", desc=" + desc + ", cost=" + cost + ", quantity=" + quantity + "]";
        }
    }
}