Question

I’m trying to simplify my code and I have a question: is it’s possible to convert string of IDs separated by coma to specific collection type?

So, my code now is:

String [] condition_list_id_tmp = rule.getContractRuleConditions().split(",");
List<String> condition_list_id = Arrays.asList(condition_list_id_tmp);
List<Long> condition_ids = new ArrayList<Long>();
    for (String str_id : condition_list_id){
         condition_ids.add(Long.parseLong(str_id));
    }

Can I simplify this code by using for example Type collectionType = new TypeToken<List<Long>>() {}.getType(); like in gson?

Answer 1

or using some libraries, like guava? so that there is no looping in your codes (but in theirs) ?
I saw that your mentioned your goal is “to simplify my code”

e.g.

final List<String> strList = Arrays.asList("1,2,3,4,5".split(","));
final List<Long> l = Lists.transform(strList, new Function<String, Long>() {
    @Override
    public Long apply(final String input) {
        return Long.parseLong(input);
    }
});