CODEWITHSUNDEEP
lambdajava-8java-streamcomparator
naila naseem
naila naseem

Reputation: 597

How can I convert following code to Java 8

I have written a following code in imperative style that is working fine . but i want to convert it to java 8 , I have tried it but could not able to get in most elegant way . 

List<Wrapper> futureList = new ArrayList<>();
List<Wrapper> pastList = new ArrayList<>();
List<Wrapper> list = fooRepository.findAll();
for(Wrapper data : list){
  if(data.getSchedule().toInstant().isAfter(new Date().toInstant())
       futureList.add(data);
   else
       pastList.add(data);     
 }

Upvotes: 1

Views: 44

Answers (1)

Tomasz Linkowski
Tomasz Linkowski

Reputation: 4496

Well, the easiest thing to do if you want to use Streams is using Collectors.partitioningBy like that:

Map<Boolean, List<Wrapper>> map = list.stream()
        .collect(Collectors.partitioningBy(data -> data.getSchedule().toInstant().isAfter(Instant.now())));
List<Wrapper> pastList = map.get(false);
List<Wrapper> futureList = map.get(true);

Upvotes: 3

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