题目

 

5980. 将字符串拆分为若干长度为 k 的组 - 力扣（LeetCode） (leetcode-cn.com)

解题思路

原本以为是几行代码就搞定了，但写起来还是有点复杂，功力还是不够

解题代码

import java.util.ArrayList;public class Solution5980 {public String[] divideString(String s, int k, char fill) {int n = s.length();ArrayList<String> arrayList = new ArrayList<>();int i = 0;StringBuilder stringBuilder = new StringBuilder();while (i < n) {stringBuilder.append(s.charAt(i));i++;if (i % k == 0) {arrayList.add(stringBuilder.toString());stringBuilder.delete(0, stringBuilder.length());}}if (stringBuilder.length() == 0) {return toArray(arrayList);}while (stringBuilder.length() < k) {stringBuilder.append(fill);}arrayList.add(stringBuilder.toString());return toArray(arrayList);}private String[] toArray(ArrayList<String> arrayList) {String[] strings = new String[arrayList.size()];for (int k = 0; k < arrayList.size(); k++) {strings[k] = arrayList.get(k);}return strings;}}

解题结果