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1 Answer
Yahya Saadi
4,277 PointsHello Jinhwa, Try this code in the Blog class public Set<String> getAllAuthors() { Set<String> allAuthors = new TreeSet<String>(); for (BlogPost post : getPosts()) { allAuthors.add(post.getAuthor()); } return allAuthors; } NOTE: Don't forget to import Set and TreeSet Hope this will help.
jinhwa yoo
10,042 PointsIt doesn't work....
Yahya Saadi
4,277 PointsYahya Saadi
4,277 PointsCan you please post the code so I can see where you are going wrong.