Java8의 Stream distinct 사용 방법 및 예제

List<String> strings =
        Arrays.asList("google", "apple", "google", "apple", "samsung");

Stream<String> stream1 = strings.stream();
Stream<String> stream2 = stream1.distinct();
stream2.forEach(System.out::println);

google
apple
samsung

public class StreamExample5 {
    public static void main(String args[]) {
        List<MyString> myStrings =
                Arrays.asList(new MyString("google"),new  MyString("apple"),
                        new MyString("google"), new MyString("apple"), new MyString("samsung"));
        Stream<MyString> stream3 = myStrings.stream();
        Stream<MyString> stream4 = stream3.distinct();
        stream4.forEach(System.out::println);

    }

    public static class MyString {
        public String str;

        public MyString(String str) {
            this.str = str;
        }

        @Override
        public boolean equals(Object o) {
            if (o instanceof MyString) {
                return str.equals(((MyString) o).str);
            }
            return false;
        }

        @Override
        public int hashCode() {
            return str.hashCode();
        }

        @Override
        public String toString() {
            return str;
        }
    }
}

google
apple
samsung