java connecting to oracle db

PLZ SAY ME HOW TO INSERT THE VALUES INTO ORACLE THIS IS THE CODE:

import java.io.*;
import java.sql.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
public class emp1 extends JFrame implements ActionListener
{
       private JTextField eid,ename,esal,eaddr;
       private JButton submit;
       public emp1()
         {
              setSize(300,300);
              setVisible(true);                    
              eid=new JTextField ("emp no here");
             ename=new JTextField ("emp name here");
             esal=new JTextField ("emp sal here");
             eaddr=new JTextField ("emp eaddr here");
             submit=new JButton("store");
             submit.addActionListener(this);
             Container c=getContentPane();
            c.setLayout(new FlowLayout());
            c.add(eid);
            c.add(ename);
            c.add(esal);
            c.add(eaddr);
            c.add(submit);
            setTitle("add new emp1 Record");
          }
               public void actionPerformed(ActionEvent ae)
                  {
                 String veid,vename,vesal,veaddr;
                  veid=eid.getText();
                  vename=ename.getText();
                 vesal=esal.getText();
                  veaddr=eaddr.getText();
                  String sqlstmt="insert into emp1 values(' "+veid+" ',' "+vename+" ',' "+vesal+" ',' "+veaddr+" ')";
                  System.out.println(sqlstmt);
                    try
                     {
                     Class.forName("oracle.jdbc.driver.OracleDriver");
                    Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","scott","tiger");
                     Statement stmt=con.createStatement();

                 stmt.executeUpdate(sqlstmt);
                      con.close();
                       }

                 catch(Exception e)
                    {
                    System.out.println(e);
                       }
}
public static void main(String[] ar)
{
emp1 e=new emp1();
e.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent we)
{
System.exit(0);
}
});
}  
}           

I GOT ERROR FOR THIS PROGRAM
ERROR:java.lang.ClassNotFoundException:oracle.jdbc.driver.OracleDriver