Java 16 introduces a handy new Stream.toList() method which makes it easier to convert a stream into a list. The returned list is unmodifiable and calls to any mutator method will throw an UnsupportedOperationException.
Here is some sample code:
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 | import java.util.stream.Stream;import static java.util.stream.Collectors.*;// Java 16stream.toList(); // returns an unmodifiable list// Other ways to create Lists from Streams:stream.collect(toList());stream.collect(toCollection(LinkedList::new)); // if you need a specific type of liststream.collect(toUnmodifiableList()); // introduced in Java 10stream.collect( collectingAndThen(toList(), Collections::unmodifiableList)); // pre-Java 10 |
Related post: Java 10: Collecting a Stream into an Unmodifiable Collection
Published on Java Code Geeks with permission by Fahd Shariff, partner at our JCG program. See the original article here: Java 16: Stream.toList() Opinions expressed by Java Code Geeks contributors are their own. |
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Fahd ShariffApril 15th, 2021Last Updated: April 13th, 2021
Fahd ShariffApril 15th, 2021Last Updated: April 13th, 2021
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This article is useless:
The article does not mention when or why to use the toList method.