1. /**
    2.  * @Description 这道题主要的核心是构建“双射”关系
    3.  * @Date 2022/1/12 12:50 上午
    4.  * @Author wuqichuan@zuoyebang.com
    5.  **/
    6. class Solution {
    7.     public boolean wordPattern(String pattern, String s) {
    8.         int pLength = pattern.length();
    9.         String[] sArr = s.split(" ");
    10.         if(pLength != sArr.length){
    11.             return false;
    12.         }
    13.         Map<String,Character> zhengMap = new HashMap<>();
    14.         Map<Character,String> fanMap = new HashMap<>();
    15.         for(int i = 0; i < pLength; i++){
    16.             if(zhengMap.containsKey(sArr[i]) && !zhengMap.get(sArr[i]).equals(pattern.charAt(i))){
    17.                 return false;
    18.             }
    19.             if(fanMap.containsKey(pattern.charAt(i)) && !fanMap.get(pattern.charAt(i)).equals(sArr[i])){
    20.                 return false;
    21.             }
    22.             zhengMap.put(sArr[i],pattern.charAt(i));
    23.             fanMap.put(pattern.charAt(i),sArr[i]);
    25.         }
    26.         return true;
    27.     }
    28. }