Find the Difference

import java.util.Arrays;

class Solution {
    public char findTheDifference(String s, String t) {
        
        char[] word1 = new char[s.length()];
        char[] word2 = new char[t.length()];
        char result = 'a';
    
        
        for(int i = 0; i<s.length(); i++){
            word1[i] = s.charAt(i);
        }
        
        for(int a = 0; a<t.length(); a++){
            word2[a] = t.charAt(a);
        }
        
   
        Arrays.sort(word1);
        Arrays.sort(word2);
        
        if(word1.length > word2.length){
            for(int z = 0; z<word2.length; z++){
                if(word1[z] != word2[z]){
                    result = word2[z];
                    return result;
                }
            }
        }
        else{
            for(int g = 0; g<word1.length; g++){
                if(word1[g] != word2[g]){
                    result = word2[g];
                    return result;
                }
            }
        }
        
        result = word2[word2.length-1];
        return result;
    }
}