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Given an array of strings, group anagrams together.
Example:
Input: [“eat”, “tea”, “tan”, “ate”, “nat”, “bat”],
Output:
[
[“ate”,“eat”,“tea”],
[“nat”,“tan”],
[“bat”]
]
Note:
All inputs will be in lowercase.
The order of your output does not matter.
这个题语法非常不熟练,重做。
class Solution {
public List<List<String>> groupAnagrams(String[] strs) {
Map<String, List<String>> map = new HashMap<>();
for (String s : strs){
char[] arr = s.toCharArray();
Arrays.sort(arr);
String k = String.valueOf(arr);
if (map.containsKey(k)){
map.get(k).add(s);
}else{
map.put(k, new ArrayList<String>());
map.get(k).add(s);
}
}
return new ArrayList<List<String>>(map.values());
}
}