Good afternoon, Community!
I have a List:
List<String> rate = new ArrayList<>();
and I need to convert the data into a float if it can be done with java 8 stream. I was doing it in the following way:
float valueRate = Float.parseFloat(rate);
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List rate = new ArrayList <> (); - float valueRate = Float.parseFloat (rate);edgar enrique roa perez– edgar enrique roa perez2021-04-12 21:19:14 +00:00Commented Apr 12, 2021 at 21:19
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Please read How to ask and update your question.fartem– fartem2021-04-16 05:51:50 +00:00Commented Apr 16, 2021 at 5:51
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2 Answers
Try it like this:
- Given a list of strings floating point values.
- map them to a stream of
floatusingFloat.valueOf() - and collect into a List.
List<String> list = List.of("1.2", "3.4", "2.5f");
List<Float> floats = list.stream().map(Float::valueOf).collect(Collectors.toList());
System.out.println(floats);
Prints
[1.2, 3.4, 2.5]
Comments
You can use Stream#map with Float.valueOf (to avoid autoboxing).
List<Float> res = rate.stream().map(Float::valueOf).collect(Collectors.toList());
With Java 16:
List<Float> res = rate.stream().map(Float::valueOf).toList();
1 Comment
Arvind Kumar Avinash
If possible, in all new answers, please include a note about
Stream::toList available since Java-16.