java-8 Archives - Page 8 of 11

How to sum a list of integers with java streams?

I want to sum a list of Integers. It works as follows, but the syntax does not feel right. Could the code be ...

May 5, 2022
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Custom thread pool in Java 8 parallel stream

Is it possible to specify a custom thread pool for Java 8 parallel stream? I can not find it anywhere. Imagine that I ...

May 5, 2022
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Is there a concise way to iterate over a stream with indices in Java 8?

Is there a concise way to iterate over a stream whilst having access to the index in the stream? String...

May 4, 2022
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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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Why should Java 8’s Optional not be used in arguments

I’ve read on many Web sites Optional should be used as a return type only, and not used in method arguments. I’m struggling ...

May 1, 2022
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How to convert an Iterator to a Stream?

I am looking for a concise way to convert an Iterator to a Stream or more specifically to “view” the iterator as a ...

May 1, 2022
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Converting between java.time.LocalDateTime and java.util.Date

Java 8 has a completely new API for date and time. One of the most useful classes in this API is LocalDateTime, for ...

May 1, 2022
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Convert java.util.Date to java.time.LocalDate

What is the best way to convert a java.util.Date object to the new JDK 8/JSR-310 java.time.LocalDate? Date input = new Date(); LocalDate date ...

May 1, 2022
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