I have an ArrayList<String> that is added to periodically. What I want to do is to cast the entire ArrayList to a String without doing a loop. Can anybody tell me is it possible without using loop?
Edited: So we found some solutions, Like
list.stream().collect(Collectors.joining());
Or
String result = String.join(",", list);
or some others as well. Now Just for getting knowledge I put a question which one is the most optimal way for compiler?
You could make a stream out of your list and collect it using joining collector :
list.stream().collect(Collectors.joining());
You can pass the separator to Collectors::joining method for example :
list.stream().collect(Collectors.joining("-"));
Or you can use String::join method :
String result = String.join(",", list);
where , is the separator.
I Believe you can do
String.join(", ", list);
Hope this helps :)
Given some ArrayList<String> s, all you need to use to get a String representation is s.toString().
The format is the following
[element1, element2, element3]
arrayList.stream().collect(Collectors.joining(", "))is one of the options.