hi all i m facing problem populating jtable with the data of database !m using arraylist to populate jtable .but the problem is that m unable to add databse data into jtables.i m only getting the last row elements of databse.
i should be getting this data in the jtables
BookName AuthorName
sohaib asas
maroof sasa
hh ddd
hh maoof
yy yy
yy yy
x x
x x
y y
but im getting this data instead....
BookName AuthorName
y y
y y
y y
y y
y y
y y
y y
i think the problem is in Book class ! there should be some loop to ensure that each value is entered in the jtable.
m using MVC architecture so im posting just related code not the whole code .
please help me out m stuck it it from days.

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * NewJFrame.java
 *
 * Created on Sep 8, 2011, 2:17:57 PM
 */
package com.company.librarySystem.bm.ui;

import com.company.librarySystem.bm.controller.AddController;
import com.company.librarySystem.bm.controller.DeleteController;
import com.company.librarySystem.bm.controller.UpdateController;

import com.company.librarySystem.bm.dto.Book;


/**
 *
 * @author Administrator
 */
public class NewJFrame extends javax.swing.JFrame {

    javax.swing.table.DefaultTableModel defaultTableModel = new javax.swing.table.DefaultTableModel();
    
   

    public NewJFrame()  {
        initComponents();
        jTable1.setModel(defaultTableModel);
        defaultTableModel.addColumn((Object) "Book Name");
        defaultTableModel.addColumn((Object) "Author Name");
         AddController addController = new AddController();
        addController.selectAll();
        jTable1.setModel(defaultTableModel);
      
        
        for (Book book : addController.selectAll()) {
//here is the problem it should print aa the database data but its print the last row data
          defaultTableModel.addRow(new String[]{book.BookName, book.AuthorName});
        
            
       }
        
      
   
}
      



    

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        bokName = new javax.swing.JTextField();
        authorName = new javax.swing.JTextField();
        jLabel1 = new javax.swing.JLabel();
        bookName = new javax.swing.JLabel();
        autherName = new javax.swing.JLabel();
        Add = new javax.swing.JButton();
        Update = new javax.swing.JButton();
        Delete = new javax.swing.JButton();
        jPanel1 = new javax.swing.JPanel();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = new javax.swing.JTable();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabel1.setFont(new java.awt.Font("Tahoma", 1, 14));
        jLabel1.setText("Book Management");

        bookName.setText("Book Name");

        autherName.setText("Author Name");

        Add.setText("Add");
        Add.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                AddMouseClicked(evt);
            }
        });

        Update.setText("Update");
        Update.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                UpdateMouseClicked(evt);
            }
        });

        Delete.setText("Delete");
        Delete.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                DeleteMouseClicked(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 9, Short.MAX_VALUE)
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 120, Short.MAX_VALUE)
        );

        jTable1.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {

            },
            new String [] {
                "Book name", "Author name"
            }
        ) {
            boolean[] canEdit = new boolean [] {
                false, false
            };

            public boolean isCellEditable(int rowIndex, int columnIndex) {
                return canEdit [columnIndex];
            }
        });
        jScrollPane1.setViewportView(jTable1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(26, 26, 26)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addGroup(layout.createSequentialGroup()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                    .addComponent(bookName, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                    .addComponent(autherName, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                                .addGap(51, 51, 51)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addComponent(authorName, javax.swing.GroupLayout.DEFAULT_SIZE, 250, Short.MAX_VALUE)
                                    .addComponent(bokName, javax.swing.GroupLayout.DEFAULT_SIZE, 250, Short.MAX_VALUE)))
                            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                                .addGap(6, 6, 6)
                                .addComponent(Add, javax.swing.GroupLayout.PREFERRED_SIZE, 75, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addGap(10, 10, 10)
                                .addComponent(Update, javax.swing.GroupLayout.DEFAULT_SIZE, 99, Short.MAX_VALUE)
                                .addGap(18, 18, 18)
                                .addComponent(Delete, javax.swing.GroupLayout.PREFERRED_SIZE, 121, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addGap(35, 35, 35))))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(135, 135, 135)
                        .addComponent(jLabel1))
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                        .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 375, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jLabel1)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(bokName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(bookName))
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(authorName, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(autherName))
                .addGap(29, 29, 29)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(Delete)
                    .addComponent(Add)
                    .addComponent(Update))
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(36, 36, 36)
                        .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(layout.createSequentialGroup()
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 145, Short.MAX_VALUE)))
                .addContainerGap())
        );

        pack();
    }// </editor-fold>                        

private void AddMouseClicked(java.awt.event.MouseEvent evt) {                                 

    
    AddController addController = new AddController();
    Book book = new Book();
    book.setBookName(bokName.getText());
    book.setAuthorName(authorName.getText());
    addController.add(book);
    
    defaultTableModel.addRow(new String[]{book.BookName, book.AuthorName});

    //add value to table OR refresh table automatically
}                                

private void UpdateMouseClicked(java.awt.event.MouseEvent evt) {                                    
    UpdateController updateController = new com.company.librarySystem.bm.controller.UpdateController();
    Book book = new Book();
    book.setBookName(bokName.getText());
    book.setAuthorName(authorName.getText());
    updateController.update(book);
}                                   

private void DeleteMouseClicked(java.awt.event.MouseEvent evt) {                                    
    DeleteController deleteController = new DeleteController();
    Book book = new Book();
    book.setBookName(bokName.getText());
    deleteController.delete(book);
    
}                                   

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                
                    new NewJFrame().setVisible(true);
                
            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JButton Add;
    private javax.swing.JButton Delete;
    private javax.swing.JButton Update;
    private javax.swing.JLabel autherName;
    private javax.swing.JTextField authorName;
    private javax.swing.JTextField bokName;
    private javax.swing.JLabel bookName;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    public javax.swing.JTable jTable1;
    // End of variables declaration                   
}
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.company.librarySystem.bm.dto;



/**
 *
 * @author Administrator
 */
public class Book {

    public String BookName,AuthorName;
    
    
    

  

    public void setBookName(String bookName) {
        
        this.BookName= bookName;
       // System.out.println(this.bookName);
        
    }

    public void setAuthorName(String authorName) {
       
       this.AuthorName = authorName;
       //System.out.println(this.authorName);

    }
      public String getbookName() {
        
        return BookName;
        

    }

    public String getAuthorName() {
        return AuthorName;

    }
    public void print(){
        System.out.println(BookName+"      "+AuthorName);
    }
}
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.company.librarySystem.bm.dao;

import com.company.librarySystem.bm.dto.Book;
import com.company.librarySystem.bm.misc.Constants;
import com.company.librarySystem.bm.misc.DBUtil;
import com.mysql.jdbc.ResultSetMetaData;
import com.mysql.jdbc.Statement;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

public class BookDAOImpl implements com.company.librarySystem.bm.dao.BookDAO {

    com.company.librarySystem.bm.misc.Constants constants = new Constants();
    public final String TABLE = "Book";
    public final String BOOKNAME = "bookName";
    public final String AUTHORNAME = "authorName";
    public ResultSet result;
     Constants c = new Constants();
     

    public List<Book> selectAll() {
        List<Book> bookList = new ArrayList<Book>();


        try {
            Connection connection = com.company.librarySystem.bm.misc.DBUtil.createConnection();
            //read deisgn by contract
            String query = "SELECT * FROM Book";
            Statement DataRequest = (Statement) connection.createStatement();
            result = DataRequest.executeQuery(query);
            ResultSetMetaData rsmd = (ResultSetMetaData) result.getMetaData();
            Book book = new Book();
            while (result.next()) {
               
                book.setBookName(result.getString(1));
                book.setAuthorName(result.getString(2));
                bookList.add(book);

            }

        } catch (SQLException ex) {
            Logger.getLogger(BookDAOImpl.class.getName()).log(Level.SEVERE, null, ex);
        }

        return bookList;
    }

    public List<Book> insert(Book book) {
        List<Book> bookList = new ArrayList<Book>();
        Connection connection = com.company.librarySystem.bm.misc.DBUtil.createConnection();
        try {
            String inserString = "INSERT INTO " + TABLE + " (" + BOOKNAME + ", " + AUTHORNAME + ") values (?,?)";
            PreparedStatement sPreparedStatement = connection.prepareStatement(inserString);
            sPreparedStatement.setString(1, book.getbookName());
           sPreparedStatement.setString(2, book.getAuthorName());
            sPreparedStatement.executeUpdate();
            book.setBookName(book.getbookName());
            book.setAuthorName(book.getAuthorName());
            bookList.add(book);
        } catch (Exception e) {
            e.printStackTrace();
        }
        DBUtil.closeConnection(connection);
        return bookList;
        
    }

    public boolean deleteBook(Book book) {
        Connection connection = com.company.librarySystem.bm.misc.DBUtil.createConnection();
        try {
            String inserString = " DELETE FROM " + TABLE + " WHERE " + BOOKNAME + " =? ";
            PreparedStatement sPreparedStatement = connection.prepareStatement(inserString);
            sPreparedStatement.setString(1, book.getbookName());
            sPreparedStatement.executeUpdate();
        } catch (Exception e) {
            e.printStackTrace();
        }
        DBUtil.closeConnection(connection);
        return true;
    }

    public boolean updateBook(Book book) {
        Connection connection = com.company.librarySystem.bm.misc.DBUtil.createConnection();
        try {
            PreparedStatement sPreparedStatement = connection.prepareStatement("update book set authorName=? where bookName =?");
            sPreparedStatement.setString(1, book.getAuthorName());
           sPreparedStatement.setString(2, book.getbookName());
            sPreparedStatement.executeUpdate();
        } catch (Exception e) {
            e.printStackTrace();
        }
        DBUtil.closeConnection(connection);
        return true;
    }
}

i can also post all code just help me .i m desprately looking for help :(:(:(

I just show a JTable this way:
Instantiate the table on constructor I guess:

ResultSet resultSet=new ResultSet(doQueryMethod("SELECT id,name,description FROM book"));
DefaultTableModel mdlTable=new DefaultTableModel();
JTable table=new JTable(mdlTable);
fillData();

Fill the table with resultSet data:

public void fillData(){
  mdlTable.setColumnIdentifiers("ID","NAME","DESCRIPTION");
  Object[] row;
  while(resultSet.next()){
    row=new Object[]{
      resultSet.getInt("id"),
      resultSet.getString("name"),
      resultSet.getString("description")
    };
    mdlTable.addRow(row);
  }
}

This is just an example, tell me how it goes.

thnx for reply i found the error i wasnt creating new object for each row

#


while (result.next()) {

Book book = new Book();
 
book.setBookName(result.getString(1));

book.setAuthorName(result.getString(2));

bookList.add(book);

 

}

this sets every thing

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