[스트림] 스트림의 첫번째값과 카운트

import java.io.*;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.*;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

public class z31 {

    public static void main(String[] args) {

        int[] arr = {1,2,3,3,4,2,1};
        long cnt = Arrays.stream(arr).count();
        System.out.println(cnt);

        int first = Arrays.stream(arr).findFirst().getAsInt();
        System.out.println(first);


    }
}