您按字母顺序对每个单词中的字符进行排序，以在映射中形成键，该映射的值是该键的单词列表。
当给您一个单词来查找字谜时，您可以按字母顺序对该单词中的字符进行排序，然后在地图中进行查找。
从您的示例并添加单词POOL，您将获得：
LOOP -> [LOOP, POOL, POLO]OPST -> [STOP, POST]
Java代码类似于：
public class AnagramGenerator{ private Map<String, Collection<String>> indexedDictionary; public AnagramGenerator(List<String> dictionary) { this.indexedDictionary = index(dictionary); } public Collection<String> getAnagrams(String word) { return indexedDictionary.get(sort(word)); } private Map<String, Collection<String>> index(List<String> dictionary) { MultiMap<String, String> indexedDictionary = HashMultimap.create(); for (String word : dictionary) { indexDictionary.put(sort(word), word); } return indexedDictionary.asMap(); } private String sort(String word) { List<Character> sortedCharacters= Arrays.asList(word.toCharArray()); Collections.sort(sortedCharacters); StringBuilder builder = new StringBuilder(); for (Character character : sortedCharacters) { builder.append(character); } return builder.toString(); }}
