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Conversion of Stream To Set in Java
We can convert a stream to set using the following ways.
Using stream.collect() with Collectors.toSet() method - Stream collect() method iterates its elements and stores them in a collection.collect(Collector.toSet()) method.
Using set.add() method - Iterate stream using forEach and then add each element to the set.
Example
import java.util.*;
import java.util.stream.Stream;
import java.util.stream.Collectors;
public class Tester {
public static void main(String[] args) {
Stream<String> stream = Stream.of("a","b","c","d");
// Method 1
Set<String> set = stream.collect(Collectors.toSet());
set.forEach(data -> System.out.print(data + " "));
Stream<String> stream1 = Stream.of("a","b","c","d");
System.out.println();
//Method 2
Set<String> set1 = new HashSet<>();
stream1.forEach(set1::add);
set1.forEach(data -> System.out.print(data + " "));
}
}Output
a b c d a b c d
Updated on: 18-Jun-2020
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