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Start your free trialchevano gordon
3,399 Pointsheres how far i got
still not knowing what to do
2 Answers
Steven Donovan
13,281 Pointspackage com.example;
import java.util.List;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;
public class Blog {
List<BlogPost> mPosts;
public Blog(List<BlogPost> posts) {
mPosts = posts;
}
public List<BlogPost> getPosts() {
return mPosts;
}
public Set<String> getAllAuthors() {
SortedSet<String> authors = new TreeSet<>();
for (BlogPost post : mPosts) {
authors.add(post.getAuthor());
}
return authors;
}
}
Konrad Pilch
2,435 PointsRe-watch it.
Steven Donovan
13,281 PointsSteven Donovan
13,281 PointsA Set is a unique collection of Objects. A TreeSet is an ordered collection (it implements the Set interface). So just adding Strings to a TreeSet will order them alphabetically.