I am trying to store a word document in Oracle database using JDBC.
I am using Oracle9i. But, I get the error as:

java.lang.ClassCastException
I tried creating a querystring, qstring like
String qString = "select resume from Resumes where emp_id = 9004 for update";
oracle.jdbc.driver.OracleResultSet ors = (OracleResultSet)stat.executeQuery(qString);
res.next();
BLOB blob = ors.getBLOB("resume");

But, it was of no help. I've included the code below. Please help. Thanks in advance.
Code:
import java.sql.*;
import java.sql.Driver;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import oracle.jdbc.driver.*; 
import oracle.sql.*; 

public class Datas1 extends JFrame implements ActionListener   {
    JTextField id;
    JTextField name;
    JButton next;
    JButton addnew;
    JPanel p;
    static ResultSet res ;
    static Connection conn;
    static Statement stat;
    
    public Datas1()  {
        super("Our Application");
        Container c = getContentPane();
        c.setLayout(new GridLayout(5,1));
        id = new JTextField(20);
        name = new JTextField(20);
        next = new JButton("Next");
        p = new JPanel();
        c.add(new JLabel("Customer ID",JLabel.CENTER));
        c.add(id);
        c.add(new JLabel("Customer Name",JLabel.CENTER));
        c.add(name);
        c.add(p);
        p.add(next);
        next.addActionListener(this);
        pack();
        setVisible(true);
        addWindowListener(new WIN());
}

public static void main(String args[])    {
    Datas1 d = new Datas1();
try  {
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    conn = DriverManager.getConnection("jdbc:odbc:cust","SYSTEM","password"); // cust is the DSN Name
    stat = conn.createStatement();
    stat.execute("INSERT INTO Resumes(emp_id,name,resume)VALUES(9004,'Tom',empty_blob())");
    System.out.println("LINE1");
    conn.setAutoCommit(false);
    res = stat.executeQuery( "select resume from Resumes where emp_id = 9004 for update");
    System.out.println("LINE2");
    res.next();
    System.out.println("LINE3");
    oracle.sql.BLOB blob = ((OracleResultSet)res).getBLOB("resume"); //ERROR is on this line
    File resumeFile = new File("C:\\test.doc");
    System.out.println("C:\\test.doc" + resumeFile.length());
    FileInputStream fis = new FileInputStream(resumeFile);
    int bufsize = blob.getChunkSize();
    byte[] buffer = new byte[bufsize];
    OutputStream os = blob.getBinaryOutputStream();
    int nread = 0 ;
    while ((nread = fis.read(buffer)) != -1){
        os.write(buffer, 0, nread);
    }
    fis.close();
    os.flush();
    os.close();
    conn.commit();
    res = stat.executeQuery("Select emp_id, name from Resumes");  // Customers is the table name
    res.next();
    }
catch(SQLException ee){
    ee.printStackTrace(System.out);
}
catch(Exception e)   {
    System.out.println("Error" +e);
    e.printStackTrace();
}
d.showRecord(res);
}

public void actionPerformed(ActionEvent e)  {
    if(e.getSource() == next)   {
    try  {
        res.next();
    }
    catch(Exception ee) {}
    showRecord(res);
    }
}

public void showRecord(ResultSet res)   {
    try  {
    id.setText(res.getString(1));
    name.setText(res.getString(2));
    }
    catch(Exception e)  {} 
}//end of the main

//Inner class WIN implemented
class WIN extends WindowAdapter  { 
    public void windowClosing(WindowEvent w)  {
    JOptionPane jop = new JOptionPane();
    jop.showMessageDialog(null,"Database","Thanks",JOptionPane.QUESTION_MESSAGE);
}

}
} //end of the class