StackOverflow2013

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copied!<p>I give you a sample </p> <pre><code>import java.io.Serializable; public class Account implements Serializable { private int accountNo; private String custName; private int balance; /** Creates a new instance of Account */ public Account(int accNo, String name, int bal) { this.accountNo = accNo; this.custName = name; this.balance = bal; } @Override public String toString() { String str = "Account No:" + this.accountNo; str += "\nCustomer name:" + this.custName; str += "\nBalance:" + this.balance; return str; } } </code></pre> <p>Write and read object</p> <pre><code>package me.dev; import java.io.EOFException; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.util.ArrayList; import java.util.logging.Level; import java.util.logging.Logger; public class Main { public void writeObject(ArrayList<Object> listAccount) throws IOException { //Create FileOutputStream to write file FileOutputStream fos = new FileOutputStream("C:\\bank.datum"); //Create ObjectOutputStream to write object ObjectOutputStream objOutputStream = new ObjectOutputStream(fos); //Write object to file for (Object obj : listAccount) { objOutputStream.writeObject(obj); objOutputStream.reset(); } objOutputStream.close(); } public ArrayList<Account> readObject() throws ClassNotFoundException, IOException { ArrayList<Account> listAccount = new ArrayList(); //Create new FileInputStream object to read file FileInputStream fis = new FileInputStream("C:\\bank.datum"); //Create new ObjectInputStream object to read object from file ObjectInputStream obj = new ObjectInputStream(fis); try { while (fis.available() != -1) { //Read object from file Account acc = (Account) obj.readObject(); listAccount.add(acc); } } catch (EOFException ex) { //ex.printStackTrace(); } return listAccount; } /** * @param args the command line arguments */ public static void main(String[] args) throws ClassNotFoundException { try { // TODO code application logic here ArrayList<Object> listAcc = new ArrayList<Object>(); listAcc.add(new Account(1, "John", 1000)); listAcc.add(new Account(2, "Smith", 2000)); listAcc.add(new Account(3, "Tom", 3000)); Main main = new Main(); main.writeObject(listAcc); ArrayList<Account> listAccount = main.readObject(); System.out.println("listisze:" + listAccount.size()); if (listAccount.size() > 0) { for (Account account : listAccount) { System.out.println(((Account) account).toString()); } } } catch (IOException ex) { Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex); } } } </code></pre>

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