Solution

public class Solution {
    public boolean wordPattern(String pattern, String str) {
        HashMap<Character, String> map = new HashMap<Character, String>();
        char[] cArray = pattern.toCharArray();
        String[] sArray = str.split(" ");
        if (cArray.length != sArray.length) {
            return
 
 false;
        }
        for (int i = 0; i < cArray.length; i++) {
            if (map.contains(cArray[i])) {
                if (map.get(cArray[i]) != sArray[i]) {
                    return false;
                }
            } else {
                map.put(cArray[i], sArray[i]);
            }
        }
        return
 
 true;
    }
}

Problem#2

• map的put方法
• map中不能存int

Problem#1

• map的方法不熟悉, put(), containsKey()
• 解法二，存位置到字典,