Longest Words

Given a dictionary, find all of the longest words in the dictionary.

Example

Given

{
  "dog",
  "google",
  "facebook",
  "internationalization",
  "blabla"
}

the longest words are(is) ["internationalization"].

Given

{
  "like",
  "love",
  "hate",
  "yes"
}

the longest words are ["like", "love", "hate"].

分析：

因为要保持所有的最长string，所以我们可以用ARRAYLIST。如果arraylist为空，直接加进去，否则我们得把新的字符串和arraylist里面的字符串进行比较。如果小于arraylist里面的字符串，do nothing, 如果相等，则加进去，如果大于，则清空arraylist,然后把该字符串加进去。

 class Solution {
     /**
      * @param dictionary: an array of strings
      * @return: an arraylist of strings
      */
     ArrayList<String> longestWords(String[] dictionary) {
         if (dictionary == null || dictionary.length == )
             return null;
         ArrayList<String> list = new ArrayList<String>();
 
         for (String str : dictionary) {
             if (list.size() == ) {
                 list.add(str);
             } else if (list.get().length() < str.length()) {
                 list.clear();
                 list.add(str);
             } else if (list.get().length() == str.length()) {
                 list.add(str);
             }
         }
         return list;
     }
 }