hi, Hope the following code will be helpful for you.

import java.sql.*;
import java.awt.*;
import javax.swing.*;    
import java.awt.event.*;

public class  DisplayDatabaseDataToJTextArea implements ActionListener{
    final JTextArea area=new JTextArea(5,20);
    JButton b=new JButton("Get Data");
    public void createUI()
    {
        JFrame f=new JFrame();
        f.setLayout(null);
        JLabel lab1=new JLabel("Database data : ");        
        b.addActionListener(this);           

        lab1.setBounds(10,40,100,20);
        area.setBounds(120,40,150,60);
        b.setBounds(120,110,100,20);

        f.add(lab1);        
        f.add(area);
        f.add(b);
        f.setVisible(true);
        f.setSize(350,200);
    }
    public static void main(String[] args){
        DisplayDatabaseDataToJTextArea dd = new DisplayDatabaseDataToJTextArea();
        dd.createUI();
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        b = (JButton)e.getSource();     
        getOperation();
    }
    public void getOperation()
    {       
        try
        {
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            Connection con = DriverManager.getConnection("jdbc:odbc:swing");
            String sql = "select textAreaData from data";
            PreparedStatement ps = con.prepareStatement(sql);
            ResultSet rs = ps.executeQuery();           
            while(rs.next())
            {                  
               area.setText(rs.getString(1));               
            }

            JOptionPane.showMessageDialog(null, "Retrieved data succesfully.","Record Retrieved",
                    JOptionPane.INFORMATION_MESSAGE);
        }
        catch(Exception ex)
        {
            JOptionPane.showMessageDialog(null, ex.getMessage(),"Error",
                    JOptionPane.ERROR_MESSAGE);
        }           
    }    
}