Questions about Using Vector To File And JTable

Question

hi all
I want to write all data from Vector To File and read from file To Vector
And I want To show all data from vector to JTable
Note: I'm using the JBuilder Compiler
This is Class A that my datamember  And Methods in it
import java.io.*;
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2008</p>
* <p>Company: </p>
* @author unascribed
* @version 1.0
public  class A implements Serializable {
  int no;
  String name;
  int age;
  public void setA (int n,String na,int a)
    no=n;
    name=na;
    age=a;
  public void set_no(int n)
    no = n;
  public void set_age(int a)
    age = a;
    public int getage ()
    return age;
  public void setName(String a)
    name  = a;
  public String getname ()
    return name;
  public int getno ()
    return no;
This is The Frame That the JTextFeild And JButtons & JTable in it
import java.awt.*;
import java.io.*;
import java.util.*;
import com.borland.jbcl.layout.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.table.*;
import javax.swing.border.*;
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2008</p>
* <p>Company: </p>
* @author unascribed
* @version 1.0
public class Frame1 extends JFrame {
/* Vector v = new Vector ();
  public int i=0;*/
  A a = new A();
  XYLayout xYLayout1 = new XYLayout();
  JTextField txtno = new JTextField();
  JTextField txtname = new JTextField();
  JTextField txtage = new JTextField();
  JButton add = new JButton();
  JButton search = new JButton();
  /*JTable jTable1 = new JTable();
  TableModel tableModel1 = new MyTableModel(*/
            TableModel dataModel = new AbstractTableModel() {
          public int getColumnCount() { return 2; }
          public int getRowCount() { return 2;}
          public Object getValueAt(int row, int col) { return new A(); }
      JTable table = new JTable(dataModel);
      JScrollPane scrollpane = new JScrollPane(table);
  TitledBorder titledBorder1;
  TitledBorder titledBorder2;
  ObjectInputStream in;
  ObjectOutputStream out;
  JButton read = new JButton();
  public Frame1() {
    try {
      jbInit();
    catch(Exception e) {
      e.printStackTrace();
  private void jbInit() throws Exception {
    titledBorder1 = new TitledBorder(BorderFactory.createEmptyBorder(),"");
    titledBorder2 = new TitledBorder("");
    this.getContentPane().setLayout(xYLayout1);
    add.setBorder(BorderFactory.createRaisedBevelBorder());
    add.setNextFocusableComponent(txtno);
    add.setMnemonic('0');
    add.setText("Add");
    add.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        add_actionPerformed(e);
    add.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        add_actionPerformed(e);
    search.setFocusPainted(false);
    search.setText("Search");
    search.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        search_actionPerformed(e);
    xYLayout1.setWidth(411);
    xYLayout1.setHeight(350);
    read.setText("Read");
    read.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        read_actionPerformed(e);
    this.getContentPane().add(txtno, new XYConstraints(43, 35, 115, 23));
    this.getContentPane().add(txtname,  new XYConstraints(44, 67, 114, 22));
    this.getContentPane().add(txtage,      new XYConstraints(44, 97, 115, 23));
    this.getContentPane().add(add,      new XYConstraints(60, 184, 97, 26));
    this.getContentPane().add(search,  new XYConstraints(167, 185, 88, 24));
    this.getContentPane().add(table,   new XYConstraints(187, 24, 205, 119));
    this.getContentPane().add(read,   new XYConstraints(265, 185, 75, 24));
    this.setSize(450,250);
    table.setGridColor(new Color(0,0,255));
  void add_actionPerformed(ActionEvent e)
    a.set_no(Integer.parseInt(txtno.getText()));
    a.setName(txtname.getText());
    a.set_age(Integer.parseInt(txtage.getText()));
    fileOutput();
    txtno.setText(null);
    txtname.setText(null);
    txtage.setText(null);
    try
      out.writeObject(a);
      out.close();
    }catch (Exception excep){};
/*  try
       add.setDefaultCapable(true);
      v.addElement(new A());
     ((A)v.elementAt(i)).setA(Integer.parseInt(txtno.getText()),txtname.getText(),Integer.parseInt(txtage.getText()));
    JOptionPane.showMessageDialog(null,"The Record is Added");
    txtno.setText(null);
    txtname.setText(null);
    txtage.setText(null);
    i++;
  }catch (Exception excep){};*/
  void search_actionPerformed(ActionEvent e) {
    int n = Integer.parseInt(JOptionPane.showInputDialog("Enter No:"));
    for (int i=0;i<v.size();i++)
      if (((A)v.elementAt(i)).getno()==n)
        txtno.setText(Integer.toString(((A)v.elementAt(i)).getno()));
        txtname.setText(((A)v.elementAt(i)).getname() );
        txtage.setText(Integer.toString(((A)v.elementAt(i)).getage()));
  public void fileOutput()
    try
      out = new ObjectOutputStream(new FileOutputStream("c:\\UserData.txt",true));
    }catch(Exception excep){};
  public void fileInput()
    try
      in = new ObjectInputStream(new FileInputStream("c:\\UserData.txt"));
    }catch(Exception excep){};
  void read_actionPerformed(ActionEvent e) {
  fileInput();
    try
      a = (A)in.readObject();
      txtno.setText(Integer.toString(a.getno()));
      txtname.setText(a.getname());
      txtage.setText(Integer.toString(a.getage()));
    }catch (Exception excep){};
}

Answer 1

//program which copies string data between vector and file
import java.util.*;
import java.io.*;
class Util
private Vector v;
private FileReader filereader;
private FileWriter filewriter;
Util(String data[])throws Exception
  v=new Vector();
  for(String o:data)
    v.add(o);
public void listData()throws Exception
  int size=v.size();
  for(int i=0;i<size;i++)
   System.out.println(v.get(i));
public void copyToFile(String data,String fname)throws Exception
  filewriter =new FileWriter(fname);
  filewriter.write(data);
  filewriter.flush();
  System.out.println("Vector content copied into file..."+fname);
public void copyFromFile(String fname)throws Exception
  filereader=new FileReader(fname);
  char fcont[]=new char[(int)new File(fname).length()];
  filereader.read(fcont,0,fcont.length);
  String temp=new String(fcont); 
  String fdata[]=temp.substring(1,temp.length()-1).split(",");
  for(String s:fdata)
    v.add(s.trim()); 
  System.out.println("File content copied into Vector...");
public String getData()throws Exception
   return(v.toString());
class TestUtil
public static void main(String a[])throws Exception
  String arr[]={"siva","rama","krishna"};
  Util util=new Util(arr);
  System.out.println("before copy from file...");
  util.listData();
  String fname=System.getProperty("user.home")+"\\"+"vecdata";
  util.copyToFile(util.getData(),fname);
  util.copyFromFile(fname);
  System.out.println("after copy from file...");
  util.listData();
}