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Questions - java-stream

filter the objects from nested collection of Mongo db?

DeviceType.java private String Id; private List<DeviceTelemetry> telemetries = new ArrayList<>() //Getter Setter DeviceTelemetry.java (Enum Class) private String name; private String desc...
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Gopal Sakhwala

java

java-stream

Votes: 0

Answers: 1

Latest Answer

You just need to map the values from DeviceType to String List<String> filteredStartWithDeviceType = deviceTypes.stream() .filter(f -> f.getTelemetries().stream() .anyMatch(g...
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Alberto Sinigaglia

Get list of Artists from Album by using streams in JSP?

I have a list of Albums that have a list of Tracks that have a list of Artists. I want to get all artists involved in making tracks for each Album. If I have one Album, I can pass that Album to a meth...
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user15690589

java

spring-boot

jsp

java-stream

Votes: 0

Answers: 1

Latest Answer

No, you can't use streams in jsp. You have two options here: Do the loop in a traditional way in jsp. The same way you would have done it prior to java 8 streams. Even this is difficult due to the na...
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gmanjon

How to handle exceptions thrown in streams map without try catch?

I want to handle the exception without using try catch clauses. void test() { list.stream().map(obj -> { Batch batch = x.findByBatchId(obj.getBatchId()) /// exception is thr...
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t thog

java

exception

java-stream

Votes: 0

Answers: 1

Latest Answer

You can't throw checked exception that way. You can: Throw RuntimeException and handle it later, maybe in another method, or don't handle it at all: public void test() { list.stream().map(obj ->...
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Artem Evdokimov

java streams: accumulated collector

Currently, that's my code: Iterable<Practitioner> referencedPractitioners = this.practitionerRepository.findAllById( Optional.ofNullable(patient.getPractitioners()) .map(List::stream...
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Jordi

java

java-stream

Votes: 0

Answers: 1

Latest Answer

You can use Collectors.collectingAndThen(Collector<T,A,R> downstream, Function<R,RR> finisher) specialized collector for that. ...
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dshelya

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