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Title: Typed stream toArray | java.evolved

Open Graph Title: Typed stream toArray | java.evolved

X Title: Typed stream toArray | java.evolved

Description: Filter a collection and collect the results to a typed array using a single stream expression.

Open Graph Description: Filter a collection and collect the results to a typed array using a single stream expression.

X Description: Filter a collection and collect the results to a typed array using a single stream expression.

Opengraph URL: https://javaevolved.github.io/collections/stream-toarray-typed.html

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Domain: javaevolved.github.io


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Stream.toArray() ↗https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/stream/Stream.html#toArray(java.util.function.IntFunction)
View proof source ↗https://github.com/javaevolved/javaevolved.github.io/blob/main/proof/collections/StreamToarrayTyped.java
Collections Intermediate Collectors.teeing() Java 8 long count = items.stream().count(); double sum = items.stream() .mapToDouble(Item::price) .sum(); var result = new Stats(count, sum); Java 12+ var result = items.stream().collect( Collectors.teeing( Collectors.counting(), Collectors.summingDouble(Item::price), Stats::new ) ); Hover to see modern ➜ JDK 12+ → https://javaevolved.github.io/collections/collectors-teeing.html
Collections Beginner Map.entry() factory Java 8 Map.Entry e = new AbstractMap.SimpleEntry<>( "key", 42 ); Java 9+ var e = Map.entry("key", 42); Hover to see modern ➜ JDK 9+ → https://javaevolved.github.io/collections/map-entry-factory.html
Collections Beginner Immutable set creation Java 8 Set set = Collections.unmodifiableSet( new HashSet<>( Arrays.asList("a", "b", "c") ) ); Java 9+ Set set = Set.of("a", "b", "c"); Hover to see modern ➜ JDK 9+ → https://javaevolved.github.io/collections/immutable-set-creation.html
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