205. Isomorphic Strings

class Solution {
    public boolean isIsomorphic(String s, String t) {
        
        if(s.length() != t.length()){
            return false;
        }

        int []m1 = new int[128];
        int []m2 = new int[128];

        for(int i = 0 ; i < s.length() ; i++){
            if(m1[s.charAt(i)] != m2[t.charAt(i)])
                return false;
            
            m1[s.charAt(i)] = i + 1;
            m2[t.charAt(i)] = i + 1;
        }
        return true;
        
    }
}