比较 list 和map 里面的内容有什么不一样

public void chackUserCode(String policyNo, List<String> userCodelist) throws Exception {
    List<InsureMainListDto> listInsureMainListDto =  insureMainListApi.queryByPolicyNoAndValidity(policyNo);
    if(listInsureMainListDto.size()<=0){
        throw new BusinessException("此清单不存在");
    }
        InsureMainListDto insureMainListDto=listInsureMainListDto.get(0);
        String  inusrelistcode=insureMainListDto.getInusreListCode();
        //  根据清单号，农户代码查询此农户在此清单内是否存在 fyanhui
        List<NyxPolicyListDto> nyxPolicyListDtoList = nyxPolicyListApi.queryByInusreListCodeAndfcode(inusrelistcode);
        List<HerdPolicyListDto> herdPolicyListDtoList =  herdPolicyListApi.queryByInusreListCodeAndFcodeCheck(inusrelistcode);
        Map<String,String> map=new HashMap<String,String>();
        String nuserCode=null;
       if(null!=nyxPolicyListDtoList&&nyxPolicyListDtoList.size()>0){
        for(int i=0;i<nyxPolicyListDtoList.size();i++){
            NyxPolicyListDto nyxPolicyListDto=nyxPolicyListDtoList.get(i);
            nuserCode=nyxPolicyListDto.getfCode();
            map.put(nuserCode,nuserCode);
        }}
        if(null!=herdPolicyListDtoList&&herdPolicyListDtoList.size()>0){
        for (int k=0;k<herdPolicyListDtoList.size();k++){
            HerdPolicyListDto herdPolicyListDto  =herdPolicyListDtoList.get(k);
            nuserCode=herdPolicyListDto.getfCode();
            map.put(nuserCode,nuserCode);
        }
    }
       for(int j=0;j<userCodelist.size();j++){
        String userCode=userCodelist.get(j);
        boolean result= map.containsKey(userCode);
        if(result==false){
            throw new BusinessException("此农户不在清单内,请核对!"+"农户代码："+userCode);
        }
       }
}