[LC BC] Group Anagrams 52

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https://www.hackerrank.com/contests/leetcode-bootcamp-week-1/challenges/group-anagrams-52-1/problem?isFullScreen=true 문제 주어진 배열에서 anagram 끼리 모아서 출력하기 답안 public static List<String> groupAnagrams(List<String> strs) { Map<List<Character>, List<String>> map = new HashMap<>(); for (String str: strs) { List<Character> tmp = new ArrayList<>(); for (char ch: str.toCharArray()) { tmp.add(ch); } Collections.sort(tmp); List<String> res = map.getOrDefault(tmp, new ArrayList<>()); res.add(str); map.remove(tmp); map.put(tmp, res); } List<String> answer = new ArrayList<>(); for (List<String> entities: map.values()) { String entity = ""; Collections.sort(entities); for (String str: entities) { entity += str + " "; } answer.add(entity.substring(0, entity.length()-1)); } Collections.sort(answer); return answer; } 메모 뭐 차근차근하니 됐다.. 더 깔끔하게 만드는 법이 있을까

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