49. Group Anagrams (java)

Author: bluesword12350

solution/0049.Group Anagrams/Solution.java

@@ -0,0 +1,13 @@
+class Solution {
+    public List<List<String>> groupAnagrams(String[] strs) {
+        Map<String, List<String>> map = new HashMap<>();
+        for (String str : strs) {
+            char[] chars = str.toCharArray();
+            Arrays.sort(chars);
+            String key = new String(chars);
+            if (!map.containsKey(key)) map.put(key, new ArrayList<>());
+            map.get(key).add(str);
+        }
+        return new ArrayList<>(map.values());
+    }
+}