Adding / Merging / Joining two Collections / Lists 📎
import java.util.List;
import java.util.stream.Stream;
import org.junit.jupiter.api.Test;
public class JoiningTwoLists {
@Test
public void join() {
var first = List.of(1,2);
var second = List.of(3,4);
var joinedList = Stream.concat(first.stream(), second.stream()).toList();
joinedList.forEach(System.out::println);
}
}
Prints:
1 2 3 4
See it in action: