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Questions - java-stream

How can I rewrite this method using streams and lambda expressions?

I have this piece of code here that basically just creates a number of threads equal to the parameter, instantiates a MyRunnable object in each thread, adds the thread to a list of threads and then se...
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Puneet Talapaneni

java

lambda

java-stream

Votes: 0

Answers: 2

Latest Answer

You can do it like this: public class ThreadManager { protected List<Thread> threads; public void createThreads(int number) { IntStream.range(0, number).forEach(i -> threads.add(new...
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Chaosfire

To return actor older than a certain age limit using Java Stream filter function

I want to return actor older than a certain age limit using Java Stream filter function, but my code returned an error message Line 63: error: cannot find symbol [in Actor.java] .filter(actor -> a...
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silverpegasus

java

filter

stream

java-stream

Votes: 0

Answers: 1

Latest Answer

I think this line should be like this List<Actor> result = cast.stream() // convert list to stream .filter(actor -> actor.getAge() > 100) //TODO .collect(...
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Subhash Rawat

How to get a Map owned by an Object as an attribute from a List of these objects

I have an BOLReference object as follows: private String ediTransmissionId; private List<WorkflowExceptions> workflowExceptions; And the inner WorkflowExceptions looks like below: private Strin...
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Mira Devi

java

java-8

hashmap

java-stream

java-10

Votes: 0

Answers: 1

Latest Answer

In order to obtain the map businessKeyValues that contains a certain key, first, you need to apply map() operation to extract the map from a WorkflowExceptions object. Then apply filter() operation as...
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Alexander Ivanchenko

How to rid of code duplication when two similar repositories?

Upon given type I want to retrieve data from either one or another repority. This is what I came up with: if (type.equals("first")) { codes = firstRepository.findAll().st...
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Fedor Nikolaev

java

spring

spring-data

java-stream

Votes: 0

Answers: 2

Latest Answer

Something like this ? codes = (type.equals("first") ? firstRepository : secondRepository).findAll().stream() .map(numbers::getCode) .collect(Collectors.toList());
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Seb34

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