注：变位词(anagrams)指的是组成两个单词的字符相同，但位置不同的单词。比如说， abbcd和abcdb就是一对变位词。
参考链接：http://hawstein.com/posts/1.4.html
private static boolean isAnagrams(String word, String other){
if(word==null || other == null || word == other || word.length() != other.length()){
return false;
}
char[] wordToCharArray = word.toCharArray();
char[] otherToCharArray = other.toCharArray();
Arrays.sort(wordToCharArray);
Arrays.sort(otherToCharArray);
if(new String(wordToCharArray).equals(new String(otherToCharArray))){
return true;
}
return false;
}
