Given an Iterator, the task is to convert it into Stream in Java.
Examples:
Input: Iterator = {1, 2, 3, 4, 5}
Output: {1, 2, 3, 4, 5}
Input: Iterator = {'G', 'e', 'e', 'k', 's'}
Output: {'G', 'e', 'e', 'k', 's'}
Approach:
- Get the Iterator.
- Convert the iterator to Spliterator using Spliterators.spliteratorUnknownSize() method.
- Convert the formed Spliterator into Sequential Stream using StreamSupport.stream() method.
- Return the stream.
Below is the implementation of the above approach:
// Java program to get a Stream// from a given Iterator  import java.util.*;import java.util.stream.*;  class GFG {      // Function to get the Stream    public static <T> Stream<T>    getStreamFromIterator(Iterator<T> iterator)    {          // Convert the iterator to Spliterator        Spliterator<T>            spliterator = Spliterators                              .spliteratorUnknownSize(iterator, 0);          // Get a Sequential Stream from spliterator        return StreamSupport.stream(spliterator, false);    }      // Driver code    public static void main(String[] args)    {          // Get the Iterator        Iterator<Integer>            iterator = Arrays.asList(1, 2, 3, 4, 5)                           .iterator();          // Get the Stream from the Iterator        Stream<Integer>            stream = getStreamFromIterator(iterator);          // Print the elements of stream        stream.forEach(s -> System.out.println(s));    }} |
Output:
1 2 3 4 5
