Reviewanswer.java

public Reviewanswer getAnswer(int questionId) throws DataNotFoundException {
        String sql = "select * from answers where questionid=:questionId";
        Map<String, Object>  params = new HashMap<>();
        params.put("questionId",questionId);
        Reviewanswer answer = new Reviewanswer();
        try {
            answer = namedParameterJdbcTemplate.queryForObject(sql,params,Reviewanswer.class);
        }catch (DataAccessException ex){
            if("data not found(or something on similar lines)".equals(ex.getMessage())){
                throw new DataNotFoundException();
            }
        }
           return answer;

    }