2023-04-21 자연수 뒤집어 배열로 만들기

Summary

풀이 1

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class Solution {
    public int[] solution(long n) {
        String str = String.valueOf(n);
        System.out.println(str);
        int[] ans = new int[str.length()];
        for (int i=0; i < str.length(); i++) {
            ans[str.length()-1-i] = Character.getNumericValue(str.charAt(i));
        }
        
        return ans;
    }
}

풀이2

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import java.util.*;

class Solution {
    public int[] solution(long n) {
        String str = Long.toString(n);
        String reversed = new StringBuilder(str).reverse().toString();
    
        int[] arr = reversed.chars().map(Character::getNumericValue).toArray();
        return arr;
    }
}

풀이3

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public class Solution {
    public int[] solution(long n) {
        String str = Long.toString(n);
        String reversed = new StringBuilder(str).reverse().toString();
        char[] arr = reversed.toCharArray();
        int[] result = new int[arr.length];
        for (int i = 0; i < result.length; i++) {
            result[i] = arr[i] - '0';
        }
        return result;
    }
}

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