[프로그래머스] 가운데 글자 가져오기

package soltest;

public class Solution13 {
    public static String solution(String s) {
        String answer = "";
        int start=s.length()/2;
        System.out.println(start);

        if(s.length()%2==0) {
        	   answer+=s.substring(start-1,start);
        	   answer+=s.substring(start,start+1);
        }else {
            answer+=s.substring(start,start+1);
        }

        return answer;
    }
	
	public static void main(String[] args) {
		String an="qwer";
		System.out.println(solution(an));
	}

}