public PreparedStatementWrapper(Connection con,String sql,String[] columnNames) throws SQLException {
  m_sql=sql;
  m_ps=con.prepareStatement(m_sql,columnNames);
}

public PreparedStatementWrapper ( Connection con , String sql , String [ ] columnNames ) throws SQLException { m_sql = sql ; m_ps = con . prepareStatement ( m_sql , columnNames ) ; }
creates a prepared statement with given sql statement and column names .
