LeetCode 面试题17. 打印从1到最大的n位数

package math;

import java.util.Arrays;

/**
 * Created with IntelliJ IDEA.
 * Version : 1.0
 * Author  : 村雨遥
 * Email   : cunyu1024@foxmail.com
 * Website : https://cunyu1943.github.io
 * 公众号   : 村雨遥
 * Date    : 2020/4/6 11:31
 * Project : LeetCode
 * Package : math
 * Class   : Seventeen
 * Desc    : 面试题17. 打印从1到最大的n位数
 */
public class Seventeen {
	public static void main(String[] args) throws Exception {
		Seventeen seventeen = new Seventeen();
		int n = 1;
		System.out.println(Arrays.toString(seventeen.printNumbers(n)));
	}

	/**
	 * 打印从1到最大的n位数
	 * @param n
	 * @return 从1到最大的n位数组成的数组
	 */
	public int[] printNumbers(int n) {
		StringBuilder stringBuilder = new StringBuilder("1");
		for (int i = 0; i < n; i++) {
			stringBuilder.append("0");
		}

		int size = Integer.parseInt(stringBuilder.toString()) - 1;

		int[] resultArr = new int[size];
		for (int i = 0; i < size; i++) {
			resultArr[i] = i + 1;
		}

		return resultArr;
	}
}