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
Article Tags :
Recommended Articles