java-stream Archives - Page 4 of 5

Retrieving a List from a java.util.stream.Stream in Java 8

I was playing around with Java 8 lambdas to easily filter collections. But I did not find a concise way to retrieve the ...

May 4, 2022
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Convert Iterable to Stream using Java 8 JDK

I have an interface which returns java.lang.Iterable<T>. I would like to manipulate that result using the Java 8 Stream API. However Iterable can’t ...

May 4, 2022
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Java 8 Iterable.forEach() vs foreach loop

Which of the following is better practice in Java 8? Java 8: joins.forEach(join -> mIrc.join(mSession, join)); Java 7: for (String join : joins) ...

May 2, 2022
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Java 8 Distinct by property

In Java 8 how can I filter a collection using the Stream API by checking the distinctness of a property of each object? ...

April 30, 2022
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Should I always use a parallel stream when possible?

With Java 8 and lambdas it’s easy to iterate over collections as streams, and just as easy to use a parallel stream. Two ...

April 29, 2022
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Find first element by predicate

I’ve just started playing with Java 8 lambdas and I’m trying to implement some of the things that I’m used to in functional ...

April 29, 2022
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What’s the difference between map() and flatMap() methods in Java 8?

In Java 8, what’s the difference between Stream.map() and Stream.flatMap() methods? 20 s 20 Stream.flatMap, as it can be guessed by its name, ...

April 18, 2022
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How to convert a Java 8 Stream to an Array?

What is the easiest/shortest way to convert a Java 8 Stream into an array? 10 s 10 The easiest method is to use ...

April 17, 2022
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Java 8 List into Map

I want to translate a List of objects into a Map using Java 8’s streams and lambdas. This is how I would write ...

April 15, 2022
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Java 8 Iterable.forEach() vs foreach loop

The better practice is to use for-each. Besides violating the Keep It Simple, Stupid principle, the new-fangled forEach() has at least the following ...

April 8, 2022
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