Let us first create a Stream:
Stream<String> stream = Stream.of("UK", "US", "India", "Australia", "Armenia", "Canada", "Poland");
Now convert Stream to TreeSet:
Set<String> set = stream.collect(Collectors.toCollection(TreeSet::new));
The following is an example to convert String to TreeSet in Java:
Example
import java.util.Set;
import java.util.TreeSet;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class Demo {
public static void main(String[] args) {
Stream<String> stream = Stream.of("UK", "US", "India", "Australia", "Armenia", "Canada", "Poland");
Set<String> set = stream.collect(Collectors.toCollection(TreeSet::new));
set.forEach(val -> System.out.println(val));
}
}
Output
Armenia
Australia
Canada
India
Poland
UK
US