How to Convert an Iterator to a Stream Concisely in Java?

Converting an Iterator to a Stream: A Concise Approach

It often becomes necessary to convert an Iterator to a Stream to leverage the powerful stream processing capabilities in Java. Here's a concise way to achieve this:

Using a Spliterator:

<code class="java">Iterator<String> sourceIterator = Arrays.asList("A", "B", "C").iterator();
Stream<String> targetStream = StreamSupport.stream(
          Spliterators.spliteratorUnknownSize(sourceIterator, Spliterator.ORDERED),
          false);</code>

This approach allows you to create a stream efficiently without creating an intermediary collection.

Alternatively, you can use an Iterable to create a stream:

<code class="java">Iterator<String> sourceIterator = Arrays.asList("A", "B", "C").iterator();

Iterable<String> iterable = () -> sourceIterator;
Stream<String> targetStream = StreamSupport.stream(iterable.spliterator(), false);</code>

This method is easier to read and maintains the functional programming style.

By using these techniques, you can effectively convert an Iterator to a Stream, enabling you to harness the full power of streams for data processing and manipulation.

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