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
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