剑指Offer LeetCode 面试题17. 打印从1到最大的n位数

class Solution {
    static public int[] printNumbers(int n) {
        String str = "";
        for (int i = 0; i < n; i++) {
            str = str +"9";
        }
        int[] ints = new int[Integer.valueOf(str)];
        for (int i = 0; i < ints.length; i++) {
            ints[i] = i+1;
        }
        return ints;
    }
    public static void main(String[] args) {
        int[] ints = printNumbers(3);
        for (int i = 0; i < ints.length; i++) {
            System.out.print(ints[i]+",");
        }
    }
}