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8252399: Update mapMulti documentation to use type test pattern instead of instanceof once JEP 375 exits preview

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Reviewed-by: dfuchs, psandoz, smarks
This commit is contained in:
Patrick Concannon 2021-03-09 11:09:40 +00:00
parent 0f2402d0a2
commit fbe40e8926
2 changed files with 80 additions and 6 deletions
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14
src/java.base/share/classes/java/util/stream/Stream.java
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@ -340,6 +340,8 @@ public interface Stream<T> extends BaseStream<T, Stream<T>> {
*/
DoubleStream flatMapToDouble(Function<? super T, ? extends DoubleStream> mapper);
// THE EXAMPLES USED IN THE JAVADOC MUST BE IN SYNC WITH THEIR CORRESPONDING
// TEST IN test/jdk/java/util/stream/examples/JavadocExamples.java.
/**
* Returns a stream consisting of the results of replacing each element of
* this stream with multiple elements, specifically zero or more elements.
@ -386,8 +388,8 @@ public interface Stream<T> extends BaseStream<T, Stream<T>> {
* <pre>{@code
* Stream<Number> numbers = ... ;
* List<Integer> integers = numbers.<Integer>mapMulti((number, consumer) -> {
* if (number instanceof Integer)
* consumer.accept((Integer) number);
* if (number instanceof Integer i)
* consumer.accept(i);
* })
* .collect(Collectors.toList());
* }</pre>
@ -397,8 +399,8 @@ public interface Stream<T> extends BaseStream<T, Stream<T>> {
* <pre>{@code
* class C {
* static void expandIterable(Object e, Consumer<Object> c) {
* if (e instanceof Iterable) {
* for (Object ie: (Iterable<?>) e) {
* if (e instanceof Iterable<?> elements) {
* for (Object ie : elements) {
* expandIterable(ie, c);
* }
* } else if (e != null) {
@ -407,8 +409,8 @@ public interface Stream<T> extends BaseStream<T, Stream<T>> {
* }
*
* public static void main(String[] args) {
* Stream<Object> stream = ...;
* Stream<Object> expandedStream = stream.mapMulti(C::expandIterable);
* var nestedList = List.of(1, List.of(2, List.of(3, 4)), 5);
* Stream<Object> expandedStream = nestedList.stream().mapMulti(C::expandIterable);
* }
* }
* }</pre>