Basics of jdbc programming Tutorial-11(Retrieving a text file from oracle database)

this video deals with the overall idea of how the jdbc program is connected to the database to retrieve a text file from the database.
//Retrieving a text file from the oracle database
class Jdbc
{
public static void main(String[] args) throws Exception
{

Connection con=null;
PreparedStatement pst=null;
ResultSet rs=null;
try
{
"student","shubham123");
if(con!=null)
{
}
if(pst!=null)
{
int ch;
}
}
catch(SQLException e)
{
}
catch(ClassNotFoundException e)
{
}
catch(Exception e)
{
}
finally
{
}

}
}