Untitled

class Solution {
    public boolean wordPattern(String pattern, String str) {
      // if(pattern.length()!=) 
       String[] words = str.split(" ");
       if(pattern.length()!=words.length) return false;  
       HashMap<Character,String> map = new HashMap<>(); 
       for(int i=0;i<pattern.length();i++){
             char c = pattern.charAt(i);
             if(map.containsKey(c)){
                 if(!map.get(c).equals(words[i])){
                     return false;
                 }
             }else{
                 if(map.containsValue(words[i])){
                     return false;
                 }
                 map.put(c,words[i]);
             }
       }
       return true; 
    }
}