The opposite of converting a string to a stream, this example will demonstrate converting a java 8 stream into a string. A Collector is a reduction operation which will gather together elements from a stream into a cumulative result of a String. Collectors.joining() will return a Collector that will concatenates the input elements into a String which has similar behavior to joining strings. If you want to join the string by a delimiter just pass in a CharSequence into the joining method. For instance, if you want to join string by a comma it would look like Collectors.joining(",").
Java 8
@Test
public void stream_to_list() {
String streamToString = Stream.of("a", "b", "c")
.collect(Collectors.joining());
assertEquals("abc", streamToString);
}If you prefer, you could use a static import.
...
import static java.util.stream.Collectors.toSet;
...
@Test
public void stream_to_set() {
String streamToString = Stream.of("a", "b", "c")
.collect(joining());
assertEquals("abc", streamToString);
}