题解 | #把数字翻译成字符串#

import java.util.*;


public class Solution {
    /**
     * 解码
     * @param nums string字符串 数字串
     * @return int整型
     */
    public int solve (String nums) {
        if(nums.length()<=1)
            return "0".equals(nums)?0:1;
        int[] dp = new int[nums.length()];
        dp[0] = 1;
        char[] chars = nums.toCharArray();
        for(int i=0; i<nums.length()-1; i++){
            int curr = ((int)chars[i])-48;
            int next = ((int)chars[i+1])-48;
            if(0==next && 0==curr)
                return 0;
            if((curr*10+next) <= 26 && 0!=next && 0!=curr){
                if(i>=1)
                    dp[i+1] = dp[i] + dp[i-1];
                else
                    dp[i+1] = 1+dp[i];
            }else{
                dp[i+1] = dp[i];
            }
        }
        System.out.println(Arrays.toString(dp));
        return dp[nums.length()-1];
    }
}