[알고리즘문제풀기] 문자열 돌리기

문제

내가 작성한 정답

// char[]
import java.util.Scanner;

public class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        for(char c: a.toCharArray()){
            System.out.println(c);
        }
    }
}

import java.util.*;
import java.util.stream.*;

public class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();

        a.chars()  // 문자열을 IntStream으로 변환 (각 문자의 유니코드 값)
         .mapToObj(c -> (char) c)  // int → char로 변환
         .forEach(System.out::println);
    }
}

// String[]
import java.util.Scanner;

public class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        for(String c: a.split("")){
            System.out.println(c);
        }
    }
}

import java.util.*;
import java.util.stream.*;

public class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();

        Arrays.stream(a.split(""))  // String[] → Stream<String>
              .forEach(System.out::println);
    }
}

// charAt
import java.util.Scanner;

public class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        for(int i=0; i<a.length();i++){
            System.out.println(a.charAt(i));
        }
    }
}

import java.util.*;
import java.util.stream.*;

public class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();

        IntStream.range(0, a.length())  // 0부터 a.length()-1까지
                 .mapToObj(a::charAt)   // 각 인덱스의 문자로 변환
                 .forEach(System.out::println);
    }
}