class Solution {
    public String solution(String myString) {
        String answer = "";
        return answer;
    }
}

해결법

방법 1

class Solution {
    public String solution(String myString) {
        myString = myString.toLowerCase();
        myString = myString.replaceAll("a", "A");
        
        return myString;
    }
}

방법 2

class Solution {
    public String solution(String myString) {
        String answer = "";
        
        for (int i = 0; i < myString.length(); i++) {
            String s = myString.charAt(i) + "";
            
            if (s.equals("a") || s.equals("A")) {
                s = s.toUpperCase();
            } else {
                s = s.toLowerCase();
            }
            
            answer += s;
        }
        
        return answer;
    }
}

A 강조하기 Lv. 0