LeetCode/com/zerroi/leetcode/Three18/WordPattern.java

package com.zerroi.leetcode.Three18;

import java.util.HashMap;
import java.util.Map;
import java.util.Objects;

public class WordPattern {
    public static void main(String[] args) {
        SolutionThird solutionThird = new SolutionThird();
        boolean res = solutionThird.wordPattern("aaaa", "dog cat cat dog");
        System.out.println("res = " + res);

    }
}

class SolutionThird {
    public boolean wordPattern(String pattern, String s) {
        HashMap<Character, String> patternToS = new HashMap<>();
        HashMap<String, Character> SToPattern = new HashMap<>();
        String[] strs = s.split(" ");
        if (pattern.length() != strs.length) {
            return false;
        }
        for (int i = 0; i < pattern.length(); i++) {
            char c = pattern.charAt(i);
            String str = strs[i];
            if (patternToS.containsKey(c)) {
                if (!Objects.equals(patternToS.get(c), str)) {
                    return false;
                }
            } else {
                patternToS.put(c, str);
            }

            if (SToPattern.containsKey(str)) {
                if (SToPattern.get(str) != c) {
                    return false;
                }
            } else {
                SToPattern.put(str, c);
            }
        }
        return true;
    }
}