In java please

Write a new class called DigitSum that determines the digit sum of a positive integer. The digit sum of an integer is the sum of all its digits. You must use a while loop for this exercise. Hint: the last digit of an integer n is given by n % 10 (https://en.wikipedia.org/wiki/Digit um). Example 1: Enter a positive integer: 5 The sum of the digits is 5 Example 2: Enter a positive integer: 1729 The sum of the digits is 19