LeetCode31|打印从1到最大的n位数

输入: n = 1
输出: [1,2,3,4,5,6,7,8,9]
 
说明：
用返回一个整数列表来代替打印
n 为正整数

 
public class PrintNumbersTest {
    public static void main(String[] args) {
        int n = 1;
        int[] printNumbers =
                printNumbers(n);
        for (Integer j : printNumbers
        ) {
            System.out.print(j + "\t");
        }
    }

    public static int[] printNumbers(int n) {
        if (n == 0) {
            return new int[0];
        }
        double v = Math.pow(10, n)-1;
        int[] results = new int[(int) v];
        for (int i = 0; i < v ; i++) {
            results[i] = i + 1;
        }
        return results;
    }
}