Streams on Strings

Lab Java Intermediate 20 points

Read a sentence. Using streams print: the distinct words in lower case, sorted, joined by commas; and the average word length with 2 decimals.

Input

One line.

Output

Two lines.

Example

Input

The cat saw the Dog and the CAT

Output

and,cat,dog,saw,the
3.00

Sample input available Sample output available

Editor

Java

Hints

distinct() removes duplicates; sorted() sorts.

Collectors.joining(",") joins strings.

Solution explanation

average() returns an OptionalDouble because an empty stream has no average.

Show solution

import java.util.Arrays;
import java.util.Scanner;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String[] words = sc.nextLine().trim().split("\\s+");
        String distinct = Arrays.stream(words)
                .map(String::toLowerCase)
                .distinct()
                .sorted()
                .collect(Collectors.joining(","));
        double avg = Arrays.stream(words).mapToInt(String::length).average().orElse(0);
        System.out.println(distinct);
        System.out.printf("%.2f%n", avg);
    }
}

Output

Answer