LintCode 加一题目分析代码

public class Solution {
    /**
     * @param digits a number represented as an array of digits
     * @return the result
     */
    public int[] plusOne(int[] digits) {
        // Write your code here
        String s = "";
        for(int i=0; i<digits.length; i++){
            s += digits[i];
        }
        long m = Long.valueOf(s) + 1;
        String s1 = m + "";
        int[] ans = new int[s1.length()];
        for(int i=0; i<s1.length(); i++){
            ans[i] = (Integer.valueOf(s1.charAt(i) + ""));
        }
        return ans;
    }
}