242. Valid Anagram

Given two strings s and t, write a function to determine if t is an anagram of s.

For example,
s = “anagram”, t = “nagaram”, return true.
s = “rat”, t = “car”, return false.

Note:
You may assume the string contains only lowercase alphabets.

Follow up:
What if the inputs contain unicode characters? How would you adapt your solution to such case?

public class Solution {  
    public boolean isAnagram(String s, String t) {  
        char[] sArr = s.toCharArray();  
        char[] tArr = t.toCharArray();  

        Arrays.sort(sArr);  
        Arrays.sort(tArr);  

        return String.valueOf(sArr).equals(String.valueOf(tArr));  
    }  
}