205. Isomorphic Strings

class Solution 
{
    public boolean isIsomorphic(String s, String t)
     {
        if (s. length() != t. length())
         {
            return false;
         }
        
// Create a hashmap to store character mappings
        Map<Character, Character> charMappingMap = new HashMap<>();
        for (int i=0; i<s.length(); i++)
         {
            char original = s.charAt(i);
            char replacement = t.charAt(i);
            
            if (!charMappingMap.containsKey(original))
             {
                if (!charMappingMap.containsValue(replacement))
                charMappingMap.put(original, replacement);
                
                else
                return false;
                }
                
                else 
                {
                    char mappedCharacter = charMappingMap.get(original);
                    if (mappedCharacter != replacement)
                    return false;
                    }
                    }
                    return true;
     }
}