凉凉夜色为我思念成河

1. 第一行输入后面每个分隔字符串的长度，第二，行输要处理的字符串，然后这个字符串处理的情况是-分开第一个不变，之后的每一个字符串中大写字母大于小写字母则全部转为大写小写字母大于大写字母则全部转为小写
   
   我的解题思路

import java.util.*;

public class Main {
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        String ii = in.nextLine();
        int length = Integer.parseInt(ii);
        String s = in.nextLine();
        String[] strList = s.split("-");
        StringBuffer sb = new StringBuffer();
        sb.append(strList[0]).append("-");
        StringBuffer action = new StringBuffer();
        for (int i = 1; i<strList.length; i++) {
           action.append(strList[i]);
        }
        int size = action.length() / length;
        for (int i = size; i > 0; i--) {
            String substring = action.substring(0, length);
            char[] chars = substring.toCharArray();
            int lower = 0;
            int higher = 0;
            for (char aChar : chars) {
                //if (aChar == '@') continue;
                if (aChar >= 'A' && aChar <= 'Z') {
                    higher ++;
                } else if (aChar >= 'a' && aChar <= 'z') {
                    lower ++;
                }
            }
            if (lower > higher) {
                sb.append(substring.toLowerCase()).append("-");
            } else if (lower < higher){
                sb.append(substring.toUpperCase()).append("-");
            } else {
                sb.append(substring).append("-");
            }
            action.delete(0, 3);
        }
        sb.append(action);
        if (sb.charAt(sb.length()-1) == '-') {
            sb.deleteCharAt(sb.length()-1);
        }
        System.out.println(sb);
    }
}