46-把数字翻译成字符串

class Solution {
    public int translateNum(int num) {
        String s = String.valueOf(num);
        int[] dp = new int[s.length() + 1];
        dp[0] = 1;
        dp[1] = 1;
        for(int i = 2;i < s.length() + 1;i++){
            dp[i] += dp[i - 1];
            if(s.charAt(i - 2) != ‘0‘){
                int n = Integer.valueOf(s.substring(i - 2,i));
                if(n >= 0 && n <= 25){
                    dp[i] += dp[i - 2];
                }
            }
        }
        return dp[s.length()];
    }
}