가운데 글자 가져오기

public class MiddleLetter {
    public static void main(String[] args) {
        String result= solution("qwer");
        System.out.print(result);
    }
    public static String solution(String s){
        int len= s.length();
        String answer= "";
        if(len%2 != 0){
            char charAnswer= s.charAt(len/2);
            answer= String.valueOf(charAnswer);

        }else{
            char charAnswer1= s.charAt(len/2 -1);
            char charAnswer2= s.charAt(len/2);
            answer= String.valueOf(charAnswer1)+ String.valueOf(charAnswer2);
        }
        return answer;
    }

}