java 에서 숫자의 자릿수 알아내기

@Test public void digit() { int number = 0; int digit = 0; number = 5; digit = getDigit(number); System.out.println("number = " + number + ", digit = " + digit); number = 15; digit = getDigit(number); System.out.println("number = " + number + ", digit = " + digit); number = 115; digit = getDigit(number); System.out.println("number = " + number + ", digit = " + digit); } private int getDigit(int number) { return getDigit(number, 1); } private int getDigit(int number, int digit) { if (number / (int) Math.pow(10, digit) == 0) { return digit; } return getDigit(number, ++digit); }