4. 대소문자 바꿔서 출력하기

school.programmers.co.kr

https://school.programmers.co.kr/learn/courses/30/lessons/181949

내 답안

import java.util.Scanner;

public class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String result = "";
        
        for(int i=0; i<a.length(); i++){
            char c = a.charAt(i);
            if(Character.isUpperCase(c)){
                result += Character.toLowerCase(c);
            }else{
                result += Character.toUpperCase(c);
            }
        }
        System.out.print(result);
        
    }
}
Java
복사

다른 사람 풀이법

import java.util.*;

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


        for(Character c : a.toCharArray()){
            if(Character.isUpperCase(c)){
                answer += Character.toLowerCase(c);
            }
            else if(Character.isLowerCase(c)){
                answer += Character.toUpperCase(c);
            }
        } 
        System.out.println(answer);
    }
}
Java
복사

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++) {
            char c = a.charAt(i);
            if(Character.isUpperCase(c)) {
                System.out.print((char)(c+32));
            }
            else {
                System.out.print((char)(c-32));
            }
        }
    }
}
Java
복사