JDBC Update using PrepStatement

package college;
import java.sql.*;

public class Update {
     public static void main(String[] args) {
    Connection con;
        PreparedStatement pstmt;
        try
        {
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            con=DriverManager.getConnection("Jdbc:Odbc:Aakarshap");
            con.setAutoCommit(false); //Set this silly property to false
          String qrystr="Update Employee set Salary=Salary+1000 where eNum=?";
            pstmt=con.prepareStatement(qrystr);
            pstmt.setInt(1, 1001);
            pstmt.executeUpdate();
            con.commit(); //Manually commit like a God
        }
        catch(ClassNotFoundException ce)
        {
            System.out.println("Error"+ce);
        }
        catch(SQLException se)
        {
            System.out.println("Error"+se);
        }
     }
}