用Java语句写一个正向分解整数的程序,没用substring截取输出.

前言:
博主刚从Java起步,想做一个正向分解整数的操作,然后思索半天,查了半天资料敲出来,然后查资料的途中发现了substring截取输出的方法,但还没来得及学习,以后补充吧!
先放纯语法正向分解整数的代码:

public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("请输入分解值:");
        int n = in.nextInt();
        int num = n;
        int bit = 0;
        //判断输入值的位数
        if (n > 0 || n < 0) {
            while (n != 0) {
                n = n / 10;
                bit += 1;
            }
        }
        else {
            bit = 1;
        }
        System.out.println("位数:"+bit);
        double power = 0;
        power = Math.pow(10, (bit - 1));
        for (int i = 1; i <= bit; i++) {
        //输出就不会改变变量
       	    System.out.print("分解为:"+(int) (num/power)+" ");   
            num%= power;
            power /= 10;
        }
    }