len of number in java

1int length = (int) (Math.log10(number) + 1);
2

1Scanner s = new Scanner(System.in);
2		int n = s.nextInt();
3		
4		int length = String.valueOf(n).length();
5		System.out.print(length);

1int length = 0;
2long temp = 1;
3while (temp <= number) {
4    length++;
5    temp *= 10;
6}
7return length;
8