[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);
        }
        
    }
}

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));
        }
        
    }
}

String

import java.util.Scanner;

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

다른 사람들의 정답

forEach - String

import java.util.*;
import java.util.Scanner;

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

        Arrays.stream(a.split("")).forEach(System.out::println);
    }
}

forEach - char

import java.util.Scanner;

public class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        // a.chars()는 IntStream을 반환하기 때문에 (char)로 변환하지 않으면 숫자로 출력된다
        a.chars().forEach(c->System.out.println((char)c));
        
        //그래서 이렇게 해도 됨
        a.chars().mapToObj(i->(char)i).forEach(System.out::println);
        
    }
}