Longest Words
Given a dictionary, find all of the longest words in the dictionary.
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;
}
}
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